OFFSET
0,2
COMMENTS
Apparently this is the convolution square of A255252. - R. J. Mathar, Feb 22 2021
LINKS
Johann Cigler, Some Pascal-like triangles, 2018.
Ono and Skinner, Fourier coefficients of half-integral weight modular forms modulo l, Ann. Math., 147 (1998), 453-470.
EXAMPLE
q^3-2*q^7-1*q^11+2*q^15-3*q^19+...
MAPLE
nmax := 30;
eta := product(1-q^i, i=1..nmax) ; # eta=A010815
g := subs(q=q^4, eta)^4*eta^2 ;
g := taylor(g, q=0, nmax+1) ;
seq( coeftayl(g, q=0, i), i=0..nmax) ; # R. J. Mathar, Feb 22 2021
CROSSREFS
KEYWORD
sign,easy
AUTHOR
EXTENSIONS
More terms from James A. Sellers, Feb 09 2000
STATUS
approved