A338996 - OEIS

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A338996 as a simple table

n	a(n)
0	0
1	5
2	27
3	85
4	205
5	420
6	770
7	1302
8	2070
9	3135
10	4565
11	6435
12	8827
13	11830
14	15540
15	20060
16	25500
17	31977
18	39615
19	48545
20	58905
21	70840
22	84502
23	100050
24	117650
25	137475
26	159705
27	184527
28	212135
29	242730
30	276520

[0,5,27,85,205,420,770,1302,2070,3135,4565,6435, 8827,11830,15540,20060,25500,31977,39615,48545, 58905,70840,84502,100050,117650,137475,159705, 184527,212135,242730,276520]