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A028402 as a simple table

n a(n)
2 6
3 20
4 72
5 272
6 1056
7 4160
8 16512
9 65792
10 262656
11 1049600
12 4196352
13 16781312
14 67117056
15 268451840
16 1073774592
17 4295032832
18 17180000256
19 68719738880
20 274878431232
21 1099512676352
22 4398048608256
23 17592190238720
24 70368752566272
25 281474993487872
26 1125899940397056

[6,20,72,272,1056,4160,16512,65792,262656,1049600,
 4196352,16781312,67117056,268451840,1073774592,
 4295032832,17180000256,68719738880,274878431232,
 1099512676352,4398048608256,17592190238720,
 70368752566272,281474993487872,1125899940397056]

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Last modified April 25 01:35 EDT 2024. Contains 371964 sequences. (Running on oeis4.)