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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
Cf. A010815.
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Apparently this is the convolution square of A255252. - R. J. Mathar, Feb 22 2021
Ono and Skinner, Ann. Math., 147 (1998), 453-470.
Ono and Skinner, <a href="https://doi.org/10.2307/121015">Fourier coefficients of half-integral weight modular forms modulo l</a>, Ann. Math., 147 (1998), 453-470.
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Johann Cigler, <a href="https://homepage.univie.ac.at/johann.cigler/preprints/losanitsch3.pdf">Some Pascal-like triangles</a>, 2018.
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More terms from _James A. Sellers (sellersj(AT)math.psu.edu), _, Feb 09 2000
_N. J. A. Sloane (njas(AT)research.att.com)_.
sign,easy,new
N. J. A. Sloane (njas(AT)research.att.com).