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A072855 as a simple table

n a(n)
1 1
2 2
3 6
4 24
5 96
6 384
7 1374
8 4718
9 16275
10 57749
11 206756
12 739780
13 2637348
14 9378840
15 33318804
16 118439044
17 421340612
18 1499388117
19 5335199213
20 18980987054
21 67522942850
22 240204885524
23 854523535096
24 3040023558788
25 10815153542594

[1,2,6,24,96,384,1374,4718,16275,57749,206756,
 739780,2637348,9378840,33318804,118439044,
 421340612,1499388117,5335199213,18980987054,
 67522942850,240204885524,854523535096,
 3040023558788,10815153542594]

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Last modified October 23 07:05 EDT 2019. Contains 328335 sequences. (Running on oeis4.)