A319308 - OEIS

%I #10 Sep 17 2018 09:28:42

%S 1,-40,760,-9120,77560,-497648,2508000,-10232640,34729720,-100906760,

%T 259114704,-606957280,1327461600,-2738111280,5341699520,-9915552192,

%U 17701924600,-30615844560,51294999960,-83279292960,131880275664,-204949382400,312126610080,-464844224960,680432137440

%N Expansion of theta_4(q)^20 in powers of q = exp(Pi i t).

%H Seiichi Manyama, <a href="/A319308/b319308.txt">Table of n, a(n) for n = 0..10000</a>

%F Expansion of eta(q)^40 / eta(q^2)^20 in powers of q.

%Y theta_4(q)^b: A002448 (b=1), A104794 (b=2), A213384 (b=3), A096727 (b=4), A035016 (b=8), A286346 (b=12), A319307 (b=16), this sequence (b=20), A319309 (b=24), A319310 (b=28).

%K sign

%O 0,2

%A _Seiichi Manyama_, Sep 16 2018