A082147 - cp's OEIS frontend

A082147 a(0)=1; for n >= 1, a(n) = Sum_{k=0..n} 8^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	9
3	89
4	945
5	10577
6	123129
7	1476841
8	18130401
9	226739489
10	2878666857
11	37006326777
12	480750990993
13	6301611631473
14	83240669582937
15	1106980509493641
16	14808497812637121
17	199138509770855489
18	2690461489090104009

[1, 1, 9, 89, 945, 10577, 123129, 1476841, 18130401, 226739489, 2878666857, 37006326777, 480750990993, 6301611631473, 83240669582937, 1106980509493641, 14808497812637121, 199138509770855489, 2690461489090104009]

cp's OEIS Frontend

A082147 a(0)=1; for n >= 1, a(n) = Sum_{k=0..n} 8^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

A082147 a(0)=1; for n >= 1, a(n) = Sum_{k=0..n} 8^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

A082147 a(0)=1; for n >= 1, a(n) = Sum_{k=0..n} 8^kN(n,k) where N(n,k) = (1/n)C(n,k)*C(n,k+1) are the Narayana numbers (A001263).