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A120591 Self-convolution cube of A120590, such that a(n) = 4*A120590(n) for n>=2. 2
1, 3, 12, 76, 600, 5304, 50232, 498360, 5112756, 53796820, 577370508, 6295961100, 69557631936, 776913430272, 8758443555360, 99527014659360, 1138832618425272, 13110313153525272, 151738042878341400, 1764609260161776600 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..19.

EXAMPLE

A(x) = 1 + 3*x + 12*x^2 + 76*x^3 + 600*x^4 + 5304*x^5 + 50232*x^6 +...

A(x)^(1/3) = 1 + x + 3*x^2 + 19*x^3 + 150*x^4 + 1326*x^5 + 12558*x^6 +...

PROG

(PARI) {a(n)=local(A=1+x+3*x^2+x*O(x^n)); for(i=0, n, A=A-4*A+3+x+A^3); polcoeff(A^3, n)}

CROSSREFS

Cf. A120590 (A(x)^(1/3)); A120588, A120592 - A120607.

Sequence in context: A247330 A168366 A134524 * A247057 A032114 A193162

Adjacent sequences:  A120588 A120589 A120590 * A120592 A120593 A120594

KEYWORD

nonn

AUTHOR

Paul D. Hanna, Jun 16 2006

STATUS

approved

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Last modified October 16 05:44 EDT 2018. Contains 316259 sequences. (Running on oeis4.)