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A113666
Self-convolution 6th power of A113672, where a(n) = A113672(n+1)/(n+1).
9
1, 6, 87, 1946, 57429, 2075376, 88058362, 4272270786, 232769956974, 14056832143770, 931523802358452, 67202173618455120, 5243275012537211083, 439986956480236610424, 39519795153012732250740
OFFSET
0,2
LINKS
FORMULA
G.f. satisfies: A(x) = (1 + x*d/dx[x*A(x)] )^6.
a(n) ~ c * 6^n * n! * n^(5/6), where c = 0.67248889832227393928944... - Vaclav Kotesovec, Oct 23 2020
PROG
(PARI) {a(n)=local(A=1+x*O(x^n)); for(i=1, n, A=(1+x*deriv(x*A))^6); polcoeff(A, n, x)}
KEYWORD
nonn
AUTHOR
Paul D. Hanna, Nov 04 2005
STATUS
approved