[seqfan] Q: formula in A054556
mathar at strw.leidenuniv.nl
Fri Jul 31 16:02:57 CEST 2009
I cannot comprehend the meaning of the formula
a(n) =A140063 a(n)+n
in http://research.att.com/~njas/sequences/A054556 .
I understand that a(n)=4*n^2-9*n+6 and that A140063(n)=7*n^2/2-15*n/2+5 .
So one could note for example a(n)=A140063(n)+1+n*(n-3)/2 = A140063(n)+A000217(n-2)
and may similar relations.
Is there only some punctuation, some squares or anything else missing
in the formula?
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