A078018 - cp's OEIS frontend

A078018 a(n) = Sum_{k=0..n} 6^kN(n,k), with a(0)=1, where N(n,k) = C(n,k) C(n,k+1)/n are the Narayana numbers (A001263).

n	a(n)
0	1
1	1
2	7
3	55
4	469
5	4237
6	39907
7	387739
8	3858505
9	39130777
10	402972031
11	4202705311
12	44299426717
13	471189693925
14	5051001609115
15	54513542257795
16	591858123926545
17	6459813793353265
18	70837427884259575
19	780073647992404615

[1, 1, 7, 55, 469, 4237, 39907, 387739, 3858505, 39130777, 402972031, 4202705311, 44299426717, 471189693925, 5051001609115, 54513542257795, 591858123926545, 6459813793353265, 70837427884259575, 780073647992404615]

cp's OEIS Frontend

A078018 a(n) = Sum_{k=0..n} 6^kN(n,k), with a(0)=1, where N(n,k) = C(n,k) C(n,k+1)/n are the Narayana numbers (A001263).

Table of values

List of values

cp's OEIS Frontend

A078018 a(n) = Sum_{k=0..n} 6^k*N(n,k), with a(0)=1, where N(n,k) = C(n,k) * C(n,k+1)/n are the Narayana numbers (A001263).

Table of values

List of values

A078018 a(n) = Sum_{k=0..n} 6^kN(n,k), with a(0)=1, where N(n,k) = C(n,k) C(n,k+1)/n are the Narayana numbers (A001263).