A386833 - cp's OEIS frontend

A386833 a(n) = Sum_{k=0..n} binomial(3n+1,k) binomial(3*n-k-1,n-k).

n	a(n)
0	1
1	6
2	59
3	656
4	7701
5	93210
6	1150495
7	14395428
8	181936169
9	2317140014
10	29691138099
11	382334271544
12	4943464235069
13	64137141682242
14	834561532624967
15	10886878474010700
16	142332442919829585
17	1864423992564121686
18	24464149489904517211
19	321499324010641490016
20	4230840338116037836901

[1, 6, 59, 656, 7701, 93210, 1150495, 14395428, 181936169, 2317140014, 29691138099, 382334271544, 4943464235069, 64137141682242, 834561532624967, 10886878474010700, 142332442919829585, 1864423992564121686, 24464149489904517211, 321499324010641490016, 4230840338116037836901]

cp's OEIS Frontend

A386833 a(n) = Sum_{k=0..n} binomial(3n+1,k) binomial(3*n-k-1,n-k).

Table of values

List of values

cp's OEIS Frontend

A386833 a(n) = Sum_{k=0..n} binomial(3*n+1,k) * binomial(3*n-k-1,n-k).

Table of values

List of values

A386833 a(n) = Sum_{k=0..n} binomial(3n+1,k) binomial(3*n-k-1,n-k).