A253539 - OEIS

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A253539 as a simple table

n	a(n)
1	20480
2	317696
3	4414976
4	57759744
5	751577856
6	9765667072
7	127181862144
8	1653182428416
9	21497916851456
10	279447917432064
11	3633216194866432
12	47229024750114048
13	613976442965898496
14	7981277938053733632

[20480,317696,4414976,57759744,751577856, 9765667072,127181862144,1653182428416, 21497916851456,279447917432064,3633216194866432, 47229024750114048,613976442965898496, 7981277938053733632]