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A217669 G.f.: Sum_{n>=0} (x + x^n)^n. 3
1, 2, 1, 3, 2, 4, 1, 8, 1, 7, 7, 7, 1, 22, 1, 9, 17, 20, 1, 32, 1, 37, 29, 13, 1, 86, 16, 15, 46, 72, 1, 113, 1, 102, 67, 19, 72, 239, 1, 21, 92, 313, 1, 191, 1, 244, 331, 25, 1, 575, 29, 357, 154, 392, 1, 452, 496, 577, 191, 31, 1, 1979, 1, 33, 443, 750, 1002 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Paul D. Hanna, Table of n, a(n) for n = 0..1000

EXAMPLE

G.f.: A(x) = 1 + 2*x + x^2 + 3*x^3 + 2*x^4 + 4*x^5 + x^6 + 8*x^7 + x^8 +...

where

A(x) = 1 + (x+x) + (x+x^2)^2 + (x+x^3)^3 + (x+x^4)^4 + (x+x^5)^5 +...

PROG

(PARI) {a(n)=polcoeff(sum(m=0, n, (x+x^m +x*O(x^n))^m), n)}

for(n=0, 100, print1(a(n), ", "))

CROSSREFS

Cf. A217667, A217668.

Sequence in context: A181733 A049773 A261401 * A123021 A286632 A286585

Adjacent sequences:  A217666 A217667 A217668 * A217670 A217671 A217672

KEYWORD

nonn

AUTHOR

Paul D. Hanna, Oct 10 2012

STATUS

approved

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Last modified June 28 17:14 EDT 2017. Contains 288839 sequences.