A382196 Expansion of (1 + 9 * Sum_{k>=0} x^(3^k))^(1/3).

1, 3, -9, 48, -288, 1917, -13563, 99927, -758079, 5879757, -46401705, 371337021, -3005974710, 24568145019, -202442064183, 1679864383800, -14024716370064, 117715927282470, -992725129013121, 8407191323492226, -71467963130581758, 609605555349330009

Offset

0,2

Comments

This sequence is different from A298308.

Links

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

Formula

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

Crossrefs

Cf. A223142, A223143, A298308, A382190.

Sequence in context: A306947 A183952 A298308 * A370426 A141051 A001530

Adjacent sequences: A382193 A382194 A382195 * A382197 A382198 A382199

Keyword

sign,easy

Author

Seiichi Manyama, Mar 18 2025

Status

approved