A264540 - OEIS

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A264540 as a simple table

n	a(n)
1	1
2	316
3	3273
4	59259
5	1270837
6	22000750
7	434877820
8	7956766442
9	145179765157
10	2721929529883
11	49938237730629
12	921931916235879
13	17054303884627492
14	314243411820771632
15	5803492808415667616
16	107123397799486933822

[1,316,3273,59259,1270837,22000750,434877820, 7956766442,145179765157,2721929529883, 49938237730629,921931916235879,17054303884627492, 314243411820771632,5803492808415667616, 107123397799486933822]