[seqfan] Re: Eventually-signed sequences

franktaw at netscape.net franktaw at netscape.net
Fri Mar 26 00:28:55 CET 2010

The policy has long been that the sequence should have the "sign" 
keyword if there are negative values entered in the sequence -- that 
is, in the %V, %W, and %X lines.  So your 85 examples below should be 
"nonn".  It looks like your 20 "nonn" sequences with negative values 
have them only in b-files or other extension, so they are correct.

Franklin T. Adams-Watters

-----Original Message-----
From: Charles Greathouse <charles.greathouse at case.edu>

What is the policy on sequences that have (or may have) negative
members, none of which appear in the %S, %T, and %U lines?  I tend to
think that ones that are known to have negative members should have
,sign, while I'm not sure how unknown sequences should be handled.
It's probably worthwhile to standardize this, though.

[I collected as many examples as I was able, but these lists are
surely not exhaustive.]

20 ,nonn, sequences that have negative members:
A139367(332) = -1
A139368(219) = -4
A158635(191) = -5
A161808(43) = -162729
A118480(1473) = -1
A083453(76) = 
A092243(41253) = -1
A005444(35) = -230450728485788167742674544892530875760640
A088819(34) = -34330952514996673312513889666926080
A112632(23338590792) = -1
A133097(65) = -130
A072203(906150257) = -1
A103222(130) = -16
A038698(26861) = -1
A033885(180) = -6
A066520(26861) = -1
A034598, A057752, A059571, A052435

85 ,sign, sequences that have no negative members in their %V, %W, or 
%X lines:
A015868, A014856, A015582, A014646, A014590, A014922, A014988,
A015076, A015120, A015142, A015186, A015208, A015252, A015406,
A015450, A015516, A015538, A015648, A015670, A015736, A015802,
A015846, A015912, A015978, A016000, A016110, A016132, A015088,
A015166, A015270, A015322, A015348, A015400, A015426, A015478,
A015660, A015712, A015790, A015816, A015946, A015972, A016050,
A016128, A016180, A016258, A015420, A015522, A015658, A015726,
A015760, A015828, A015862, A015930, A016168, A016236, A015586,
A015700, A015852, A015928, A015966, A016042, A016080, A016156,
A015918, A016056, A016240, A110857, A009542, A013091, A121573,
A009196, A009268, A012821, A157809, A006044, A130119, A157812,
A157827, A158516, A158530,A158531, A158532, A091750, A091751, A091758

Sequences whose signs are unknown include:
A086811, A075469, A095883, A096801

(A034414, A034415)

Charles Greathouse
Case Western Reserve University

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