A049300 - OEIS

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A049300 as a simple table

n	a(n)
1	2
2	2
3	2
4	2
5	114
6	9440
7	217128
8	60044
9	20332472
10	417086648
11	74959204292
12	187219155594
13	79622514581574
14	14478292443584
15	6002108856728918
16	12288083384384462
17	5814429911995661690
18	14719192159220252523420

[2,2,2,2,114,9440,217128,60044,20332472,417086648, 74959204292,187219155594,79622514581574, 14478292443584,6002108856728918,12288083384384462, 5814429911995661690,14719192159220252523420]