A118969 - cp's OEIS frontend

A118969 a(n) = 2binomial(5n+1,n)/(4*n+2).

n	a(n)
0	1
1	2
2	11
3	80
4	665
5	5980
6	56637
7	556512
8	5620485
9	57985070
10	608462470
11	6474009360
12	69682358811
13	757366074080
14	8300675584120
15	91634565938880
16	1018002755977245
17	11372548404732930
18	127677890035721025
19	1439777493407492640

[1, 2, 11, 80, 665, 5980, 56637, 556512, 5620485, 57985070, 608462470, 6474009360, 69682358811, 757366074080, 8300675584120, 91634565938880, 1018002755977245, 11372548404732930, 127677890035721025, 1439777493407492640]

cp's OEIS Frontend

A118969 a(n) = 2binomial(5n+1,n)/(4*n+2).

Table of values

List of values

cp's OEIS Frontend

A118969 a(n) = 2*binomial(5*n+1,n)/(4*n+2).

Table of values

List of values

A118969 a(n) = 2binomial(5n+1,n)/(4*n+2).