A280281 - OEIS

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A280281 as a simple table

n	a(n)
1	2
2	384
3	16860
4	592416
5	18844474
6	566131860
7	16393550046
8	462579750172
9	12805032188772
10	349269067529316
11	9415514952577460
12	251409624519315024
13	6660091714490230910
14	175258485314498284648
15	4585645730057094995818

[2,384,16860,592416,18844474,566131860, 16393550046,462579750172,12805032188772, 349269067529316,9415514952577460, 251409624519315024,6660091714490230910, 175258485314498284648,4585645730057094995818]