A140311 - OEIS

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A140311 as a simple table

n	a(n)
0	1
1	2
2	16
3	511
4	65089
5	33066176
6	66993993728
7	541344347284385
8	17445985904048740529
9	2242340146792849255134720
10	1149454044962768236388517543936
11	2349989206497316681704056634171383423

[1,2,16,511,65089,33066176,66993993728, 541344347284385,17445985904048740529, 2242340146792849255134720, 1149454044962768236388517543936, 2349989206497316681704056634171383423]