OFFSET
0,5
COMMENTS
For n > 2, a(n) is the n-th term of the logarithmic transform of n-gonal numbers.
LINKS
MATHEMATICA
Table[n! SeriesCoefficient[Log[1 + Exp[x] (x + (n/2 - 1) x^2)], {x, 0, n}], {n, 0, 20}]
CROSSREFS
KEYWORD
sign
AUTHOR
Ilya Gutkovskiy, Oct 08 2018
STATUS
approved