A231750 - OEIS

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A231750 as a simple table

n	a(n)
1	51
2	687
3	41288
4	1787168
5	67411714
6	2966010838
7	131956285636
8	5669387332934
9	243573416110820
10	10555475178328001
11	457172040211929179
12	19760692150060588600
13	854390327504135396722
14	36958540950287007144750

[51,687,41288,1787168,67411714,2966010838, 131956285636,5669387332934,243573416110820, 10555475178328001,457172040211929179, 19760692150060588600,854390327504135396722, 36958540950287007144750]