A358518 - cp's OEIS frontend

A358518 a(n) = Sum_{k=0..n} binomial(n+3k+3,n-k) Catalan(k).

n	a(n)
0	1
1	5
2	20
3	85
4	405
5	2116
6	11766
7	68237
8	407789
9	2492553
10	15506942
11	97859544
12	624880895
13	4029896310
14	26209648212
15	171711104853
16	1132143259711
17	7506530891217
18	50019287312324
19	334784759816729
20	2249720564735567
21	15172573979205166
22	102662981205576494

[1, 5, 20, 85, 405, 2116, 11766, 68237, 407789, 2492553, 15506942, 97859544, 624880895, 4029896310, 26209648212, 171711104853, 1132143259711, 7506530891217, 50019287312324, 334784759816729, 2249720564735567, 15172573979205166, 102662981205576494]

cp's OEIS Frontend

A358518 a(n) = Sum_{k=0..n} binomial(n+3k+3,n-k) Catalan(k).

Table of values

List of values

cp's OEIS Frontend

A358518 a(n) = Sum_{k=0..n} binomial(n+3*k+3,n-k) * Catalan(k).

Table of values

List of values

A358518 a(n) = Sum_{k=0..n} binomial(n+3k+3,n-k) Catalan(k).