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A132390 as a simple table

n a(n)
1 3
2 6
3 24
4 76
5 288
6 1072
7 4224
8 16576
9 66048
10 262912
11 1050624
12 4197376
13 16785408
14 67121152
15 268468224
16 1073790976
17 4295098368
18 17180065792
19 68720001024
20 274878693376
21 1099513724928
22 4398049656832
23 17592194433024
24 70368756760576

[3,6,24,76,288,1072,4224,16576,66048,262912,
 1050624,4197376,16785408,67121152,268468224,
 1073790976,4295098368,17180065792,68720001024,
 274878693376,1099513724928,4398049656832,
 17592194433024,70368756760576]

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Last modified January 29 01:39 EST 2020. Contains 331328 sequences. (Running on oeis4.)