A233853 - OEIS

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A233853 as a simple table

n	a(n)
1	216
2	1040
3	4640
4	22592
5	104576
6	511232
7	2416128
8	11843584
9	56662016
10	278233088
11	1340661760
12	6590103552
13	31886114816
14	156834529280
15	760657608704
16	3742678646784
17	18177218576384
18	89455627075584
19	434806175301632

[216,1040,4640,22592,104576,511232,2416128, 11843584,56662016,278233088,1340661760,6590103552, 31886114816,156834529280,760657608704, 3742678646784,18177218576384,89455627075584, 434806175301632]