A081178 - cp's OEIS frontend

A081178 a(0) = 1; for n>=1, a(n) = Sum_{k=0..n} 7^kN(n,k), where N(n,k)=(1/n)C(n,k)*C(n,k+1) are the Narayana numbers (A001263).

n	a(n)
0	1
1	1
2	8
3	71
4	680
5	6882
6	72528
7	788019
8	8766248
9	99362894
10	1143498224
11	13326176998
12	156950554384
13	1865210341828
14	22338852956064
15	269355965364459
16	3267146912972328
17	39837475762660374
18	488032452193307568

[1, 1, 8, 71, 680, 6882, 72528, 788019, 8766248, 99362894, 1143498224, 13326176998, 156950554384, 1865210341828, 22338852956064, 269355965364459, 3267146912972328, 39837475762660374, 488032452193307568]

cp's OEIS Frontend

A081178 a(0) = 1; for n>=1, a(n) = Sum_{k=0..n} 7^kN(n,k), where N(n,k)=(1/n)C(n,k)*C(n,k+1) are the Narayana numbers (A001263).

Table of values

List of values

cp's OEIS Frontend

A081178 a(0) = 1; for n>=1, a(n) = Sum_{k=0..n} 7^k*N(n,k), where N(n,k)=(1/n)*C(n,k)*C(n,k+1) are the Narayana numbers (A001263).

Table of values

List of values

A081178 a(0) = 1; for n>=1, a(n) = Sum_{k=0..n} 7^kN(n,k), where N(n,k)=(1/n)C(n,k)*C(n,k+1) are the Narayana numbers (A001263).