OFFSET
0,4
COMMENTS
Self-convolution cube is A107093.
LINKS
Seiichi Manyama, Table of n, a(n) for n = 0..1000
Ira M. Gessel, The Amdeberhan-Konvalinka Conjecture and Symmetric Functions, Séminaire Lotharingien Comb. (2024). See p. 83 of 109.
EXAMPLE
A(x)^3 = 1 + 3*x + x^3 - x^6 + 2*x^9 - 4*x^12 + 9*x^15 - 22*x^18 +...
A(x^3) = 1 + x^3 - x^6 + 2*x^9 - 4*x^12 + 9*x^15 - 22*x^18+...
PROG
(PARI) {a(n)=local(A=1+x); for(i=1, n, A=(subst(A, x, x^3)+3*x+x*O(x^n))^(1/3)); polcoeff(A, n, x)}
CROSSREFS
KEYWORD
sign
AUTHOR
Paul D. Hanna, May 11 2005
STATUS
approved