A382188 Expansion of 1/(1 - 9 * Sum_{k>=0} x^(2^k))^(1/3).

1, 3, 21, 162, 1344, 11565, 102033, 916002, 8330331, 76515363, 708379137, 6600436794, 61829064882, 581783753232, 5495344743924, 52079440119336, 494985533135250, 4716537209764020, 45043670723519952, 431041661857081656, 4132290587464466820, 39680088682182010749

Offset

0,2

Links

Table of n, a(n) for n=0..21.

Formula

G.f. A(x) satisfies A(x) = 1/(1/A(x^2)^3 - 9*x)^(1/3).

Crossrefs

Cf. A023359, A382187.

Sequence in context: A136781 A225439 A180400 * A166696 A058194 A179815

Adjacent sequences: A382185 A382186 A382187 * A382189 A382190 A382191

Keyword

nonn,easy

Author

Seiichi Manyama, Mar 18 2025

Status

approved