A131139 - OEIS

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A131139 as a simple table

n	a(n)
0	1
1	1
2	4
3	5
4	36
5	40
6	145
7	180
8	1572
9	1712
10	6181
11	7712
12	43860
13	49856
14	171844
15	213953
16	1634448
17	1798404
18	6362336
19	7945252
20	43391232
21	49532049
22	169120448
23	210664996
24	1310330112
25	1471297572

[1,1,4,5,36,40,145,180,1572,1712,6181,7712,43860, 49856,171844,213953,1634448,1798404,6362336, 7945252,43391232,49532049,169120448,210664996, 1310330112,1471297572]