A002803 - cp's OEIS frontend

A002803 a(n) = (2n+4)!/(4!n!(n+1)!).

n	a(n)
0	1
1	15
2	140
3	1050
4	6930
5	42042
6	240240
7	1312740
8	6928350
9	35565530
10	178474296
11	878850700
12	4259045700
13	20359174500
14	96172862400
15	449608131720
16	2082743551350
17	9569730173850
18	43651400793000
19	197809768856700

[1, 15, 140, 1050, 6930, 42042, 240240, 1312740, 6928350, 35565530, 178474296, 878850700, 4259045700, 20359174500, 96172862400, 449608131720, 2082743551350, 9569730173850, 43651400793000, 197809768856700]

cp's OEIS Frontend

A002803 a(n) = (2n+4)!/(4!n!(n+1)!).

Table of values

List of values

cp's OEIS Frontend

A002803 a(n) = (2n+4)!/(4!*n!*(n+1)!).

Table of values

List of values

A002803 a(n) = (2n+4)!/(4!n!(n+1)!).