A177403 G.f.: A(x) = Sum_{n>=0} x^n*A(x)^(3*n*2^n/2).

1, 1, 4, 28, 260, 2963, 40633, 683767, 14857525, 446967589, 19693511862, 1293923812003, 125472691729502, 17695828857206234, 3593735555491476826, 1045199838919610885504, 433829872260413298003925

Offset

0,3

Links

Table of n, a(n) for n=0..16.

Example

G.f.: A(x) = 1 + x + 4*x^2 + 28*x^3 + 260*x^4 + 2963*x^5 +...
A(x) = 1 + x*A(x)^3 + x^2*A(x)^12 + x^3*A(x)^36 + x^4*A(x)^96 +...

Prog

(PARI) {a(n)=local(A=1+x); for(m=1, n, A=sum(m=0, 16, x^m*(A+x*O(x^n))^(3*m*2^(m-1)))); polcoeff(A, n)}

Crossrefs

Cf. A177401, A177402.

Sequence in context: A217806 A356197 A152410 * A360775 A196523 A260775

Adjacent sequences: A177400 A177401 A177402 * A177404 A177405 A177406

Keyword

nonn

Author

Paul D. Hanna, Jun 23 2010

Status

approved