A202493 - OEIS

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A202493 as a simple table

n	a(n)
0	1
1	15
2	105
3	532
4	2241
5	8361
6	28610
7	91740
8	279624
9	818272
10	2315712
11	6372480
12	17123840
13	45082368
14	116596224
15	296879104
16	745543680
17	1849344000
18	4536958976
19	11020075008
20	26526547968
21	63329075200
22	150057123840

[1,15,105,532,2241,8361,28610,91740,279624,818272, 2315712,6372480,17123840,45082368,116596224, 296879104,745543680,1849344000,4536958976, 11020075008,26526547968,63329075200,150057123840]