A136638 - cp's OEIS frontend

A136638 a(n) = Sum_{k=0..[n/2]} C(n-k, k) * C(3^(n-2k)2^k, n-k).

n	a(n)
0	1
1	3
2	38
3	2955
4	1666194
5	6775599252
6	204212962736426
7	47025953519744215608
8	84798028785462127288681736
9	1219731316443261012339196962784452
10	141916030637329352970764084182705691263552

[1, 3, 38, 2955, 1666194, 6775599252, 204212962736426, 47025953519744215608, 84798028785462127288681736, 1219731316443261012339196962784452, 141916030637329352970764084182705691263552]

cp's OEIS Frontend

A136638 a(n) = Sum_{k=0..[n/2]} C(n-k, k) * C(3^(n-2k)2^k, n-k).

Table of values

List of values

cp's OEIS Frontend

A136638 a(n) = Sum_{k=0..[n/2]} C(n-k, k) * C(3^(n-2*k)*2^k, n-k).

Table of values

List of values

A136638 a(n) = Sum_{k=0..[n/2]} C(n-k, k) * C(3^(n-2k)2^k, n-k).