|
|
A137158
|
|
G.f.: 1 = Sum_{n>=0} a(n)*x^n/(1+x)^(4*2^n).
|
|
4
|
|
|
1, 4, 22, 228, 4749, 200240, 17034964, 2913479848, 999402129243, 686662003846640, 944294243796543974, 2598186366278914473948, 14300408328085246335179009, 157434326611214704329370130880
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
0,2
|
|
COMMENTS
|
Equals unsigned column 2 of triangle A137156.
|
|
LINKS
|
|
|
PROG
|
(PARI) {a(n)=polcoeff(1-sum(k=0, n-1, a(k)*x^k/(1+x+x*O(x^n))^(2^(k+2)) ), n)}
|
|
CROSSREFS
|
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
|
|
STATUS
|
approved
|
|
|
|