A051133 - cp's OEIS frontend

A051133 a(n) = binomial(2n,n)n(2n+1)/2.

n	a(n)
0	0
1	3
2	30
3	210
4	1260
5	6930
6	36036
7	180180
8	875160
9	4157010
10	19399380
11	89237148
12	405623400
13	1825305300
14	8143669800
15	36064823400
16	158685222960
17	694247850450
18	3022020054900
19	13095420237900
20	56517076816200
21	243023430309660
22	1041528987041400

[0, 3, 30, 210, 1260, 6930, 36036, 180180, 875160, 4157010, 19399380, 89237148, 405623400, 1825305300, 8143669800, 36064823400, 158685222960, 694247850450, 3022020054900, 13095420237900, 56517076816200, 243023430309660, 1041528987041400]

cp's OEIS Frontend

A051133 a(n) = binomial(2n,n)n(2n+1)/2.

Table of values

List of values

cp's OEIS Frontend

A051133 a(n) = binomial(2n,n)*n*(2n+1)/2.

Table of values

List of values

A051133 a(n) = binomial(2n,n)n(2n+1)/2.