A222410 - OEIS

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A222410 as a simple table

n	a(n)
0	1
1	15
2	113
3	575
4	2171
5	6581
6	16955
7	38613
8	79885
9	153091
10	275661
11	471395
12	771863
13	1217945
14	1861511
15	2767241
16	4014585
17	5699863
18	7938505
19	10867431
20	14647571
21	19466525
22	25541363
23	33121565
24	42492101
25	53976651

[1,15,113,575,2171,6581,16955,38613,79885,153091, 275661,471395,771863,1217945,1861511,2767241, 4014585,5699863,7938505,10867431,14647571, 19466525,25541363,33121565,42492101,53976651]