A373292 Expansion of 1/(1 - x/(1 - 8*x^3)^(1/4)).
1, 1, 1, 1, 3, 5, 7, 19, 35, 55, 139, 267, 447, 1077, 2115, 3689, 8595, 17101, 30703, 69797, 140027, 256873, 573167, 1156221, 2156555, 4742759, 9603287, 18149083, 39457727, 80104735, 153007747, 329580959, 670338231, 1291649283, 2761199459, 5623490391
Offset: 0
Keywords
Crossrefs
Cf. A373509.
Programs
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PARI
a(n) = sum(k=0, n\3, 8^k*binomial((n+k)/4-1, k));
Formula
a(n) = Sum_{k=0..floor(n/3)} 8^k * binomial((n+k)/4-1,k).