[seqfan] Fwd: Problems with A072229
franktaw at netscape.net
franktaw at netscape.net
Mon Apr 13 19:49:20 CEST 2009
I sent the following message to the author of this sequence last week,
but have not received any reply. Can anyone here answer my questions?
Franklin T. Adams-Watters
-----Original Message-----
From: franktaw at netscape.net
There are some problems with your sequence A072229. You gave the
formula:
a(n) = n/2 + (0, 0, 0, 0, 1, 2, 3, 4) depending on residue of n mod 8.
But if n/2 means floor(n/2), this would make the sequence start:
0,0,1,1,3,4,6,7
instead of 0,0,0,0,1,2,3,4. I would guess that what you want is
actually 4*floor(n/8) + ....
Furthermore, the terms shown do not match this formula: there is one
less of each multiple of 4 than there should be. In other words, what
is actually present is:
4*floor(n/7) + (0, 0, 0, 0, 1, 2, 3)[n mod 7].
I don't know anything about bilinear forms, so I can't tell if it is
the formula or the values that is incorrect.
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