[seqfan] A103969 is wrong, maybe useless

franktaw at netscape.net franktaw at netscape.net
Sat Mar 6 09:49:43 CET 2010

http://www.research.att.com/~njas/sequences/A103969 is titled "Numbers 
n such that n=A005941(A005940(n))."  But A005941 is "Inverse of the 
Doudna sequence A005940.", so this should be just the positive 
integers.  And indeed, the numbers not in A103969 do nevertheless have 

There is a Mathematica program in A103969, so it must be computing 
something.  I can't really tell what, from a quick examination.  Is 
this just a buggy program and a sequence that should  not be present, 
or is it something of some possible interest?

Franklin T. Adams-Watters

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