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%I #9 Nov 07 2018 21:45:14
%S 1,4,6,4,17,64,96,64,136,480,720,480,680,2240,3360,2240,2444,7536,
%T 11304,7536,7276,21568,32352,21568,21080,62752,94128,62752,62968,
%U 189120,283680,189120,178646,525464,788196,525464,454614,1292992,1939488,1292992,1085688,3049760
%N Expansion of Product_{k>=0} (1 + x^(4^k))^(4^(k+1)).
%C Also the coefficient of x^(4*n) in the expansion of Product_{k>=0} (1 + x^(4^k))^(4^k).
%e Product_{k>=0} (1 + x^(4^k))^(4^k) = 1 + x + 4*x^4 + 4*x^5 + 6*x^8 + 6*x^9 + 4*x^12 + 4*x^13 + 17*x^16 + 17*x^17 + 64*x^20 + 64*x^21 + 96*x^24 + 96*x^25 + ... .
%Y Cf. A073708, A321345, A321354, A321357.
%K nonn
%O 0,2
%A _Seiichi Manyama_, Nov 07 2018
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