A147225 - OEIS

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A147225 as a simple table

n	a(n)
1	1
2	1
3	1
4	1
5	5
6	1
7	10
8	1
9	26
10	1
11	220
12	25
13	1696
14	141
15	21805
16	844
17	438996
18	11391
19	9601298
20	152742
21	309244701
22	3160409
23	15392335628
24	110025582
25	1035900361260

[1,1,1,1,5,1,10,1,26,1,220,25,1696,141,21805,844, 438996,11391,9601298,152742,309244701,3160409, 15392335628,110025582,1035900361260]