A151834 - OEIS

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A151834 as a simple table

n	a(n)
1	1
2	8
3	120
4	2276
5	49204
6	1156688
7	28831384
8	750455268
9	20196669078
10	558157620384
11	15762232227968
12	453181069339660
13	13228272325440164
14	391166062869849024

[1,8,120,2276,49204,1156688,28831384,750455268, 20196669078,558157620384,15762232227968, 453181069339660,13228272325440164, 391166062869849024]