A082181 - cp's OEIS frontend

A082181 a(0) = 1, for n>=1, a(n) = Sum_{k=0..n} 9^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	10
3	109
4	1270
5	15562
6	198100
7	2596645
8	34825150
9	475697854
10	6595646860
11	92590323058
12	1313427716380
13	18798095833012
14	271118225915560
15	3936516861402901
16	57494017447915150
17	844109420603623030

[1, 1, 10, 109, 1270, 15562, 198100, 2596645, 34825150, 475697854, 6595646860, 92590323058, 1313427716380, 18798095833012, 271118225915560, 3936516861402901, 57494017447915150, 844109420603623030]

cp's OEIS Frontend

A082181 a(0) = 1, for n>=1, a(n) = Sum_{k=0..n} 9^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

A082181 a(0) = 1, for n>=1, a(n) = Sum_{k=0..n} 9^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

A082181 a(0) = 1, for n>=1, a(n) = Sum_{k=0..n} 9^kN(n,k), where N(n,k) = (1/n)C(n,k)*C(n,k+1) are the Narayana numbers (A001263).