|
Search: id:A102231
|
|
| |
|
| 0, 1, 5, 32, 236, 1896, 16116, 142544, 1298524, 12100952, 114820964, 1105574400, 10775285836, 106098789832, 1053858546516, 10546951101360, 106249238782652, 1076554249491640, 10964085715303620, 112175072002688480
(list; graph; listen)
|
|
|
OFFSET
|
0,3
|
|
|
PROGRAM
|
(PARI) {a(n)=local(B=vector(n+1, k, if(k==1, 1, sum(i=0, k-2, 2^(i+1)*binomial(2*k-2, i)*binomial(k-1, i+1))/(k-1)))); return(polcoeff(Ser(B)^2+x*Ser(B)^4+x*O(x^n), n))}
|
|
CROSSREFS
|
Cf. A032349, A102230.
Sequence in context: A065071 A146965 A053157 this_sequence A127089 A068102 A001923
Adjacent sequences: A102228 A102229 A102230 this_sequence A102232 A102233 A102234
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
Paul D. Hanna (pauldhanna(AT)juno.com), Jan 01 2005
|
|
|
Search completed in 0.002 seconds
|
