A145885 - cp's OEIS frontend

A145885 a(n) = (n-1)^2binomial(2n,n)/(2(n+1)).

n	a(n)
1	0
2	1
3	10
4	63
5	336
6	1650
7	7722
8	35035
9	155584
10	680238
11	2939300
12	12584726
13	53488800
14	225990180
15	950094810
16	3977737875
17	16594533120
18	69018792150
19	286296636780
20	1184823735810
21	4893253404000
22	20171905282620
23	83020426503300

[0, 1, 10, 63, 336, 1650, 7722, 35035, 155584, 680238, 2939300, 12584726, 53488800, 225990180, 950094810, 3977737875, 16594533120, 69018792150, 286296636780, 1184823735810, 4893253404000, 20171905282620, 83020426503300]

cp's OEIS Frontend

A145885 a(n) = (n-1)^2binomial(2n,n)/(2(n+1)).

Table of values

List of values

cp's OEIS Frontend

A145885 a(n) = (n-1)^2*binomial(2n,n)/(2*(n+1)).

Table of values

List of values

A145885 a(n) = (n-1)^2binomial(2n,n)/(2(n+1)).