OFFSET
2,3
COMMENTS
The g.f. of triangle A370040, F(x,y), satisfies Sum_{n=-oo..+oo} (-1)^n * (x^n + y*F(x,y))^n = 1 + (y+2)*Sum_{n>=1} (-1)^n * x^(n^2).
LINKS
Paul D. Hanna, Table of n, a(n) for n = 2..202
FORMULA
a(n) = A370040(n,1) for n >= 2.
CROSSREFS
KEYWORD
sign
AUTHOR
Paul D. Hanna, Feb 10 2024
STATUS
approved