A382187 Expansion of 1/(1 - 4 * Sum_{k>=0} x^(2^k))^(1/2).

1, 2, 8, 32, 138, 604, 2696, 12176, 55512, 254888, 1177064, 5461040, 25435296, 118856272, 556962928, 2616287392, 12315914698, 58084552572, 274395134600, 1298187523792, 6150051540460, 29170558879736, 138512004786624, 658362443599296, 3132140164624680

Offset: 0

Author

Seiichi Manyama, Mar 18 2025

Keywords

• nonn
• easy

Crossrefs

Cf. A023359, A382188.

Cf. A223142.

Formula

G.f. A(x) satisfies A(x) = 1/(1/A(x^2)^2 - 4*x)^(1/2).