A382190 Expansion of 1/(1 - 9 * Sum_{k>=0} x^(3^k))^(1/3).

1, 3, 18, 129, 981, 7749, 62766, 517401, 4320864, 36446565, 309876444, 2651681826, 22812645339, 197144727876, 1710267824304, 14886242261595, 129946357148661, 1137235357935279, 9975129925544568, 87672540348112779, 771962724133452441, 6808329943495097076

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^3)^3 - 9*x)^(1/3).

Crossrefs

Cf. A078932, A382189.

Cf. A382196.

Sequence in context: A373313 A120922 A360446 * A185113 A291775 A365134

Adjacent sequences: A382187 A382188 A382189 * A382191 A382192 A382193

Keyword

nonn,easy

Author

Seiichi Manyama, Mar 18 2025

Status

approved