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A190064 as a simple table

n a(n)
1 2
2 12
3 40
4 144
5 550
6 1896
7 7584
8 27328
9 105348
10 398760
11 1538696
12 5872800
13 22646862
14 87492676
15 339055650
16 1313842904
17 5104724558
18 19873572892
19 77470783406
20 302258087616
21 1180840902336
22 4618922848536
23 18083348822516
24 70852652846320

[2,12,40,144,550,1896,7584,27328,105348,398760,
 1538696,5872800,22646862,87492676,339055650,
 1313842904,5104724558,19873572892,77470783406,
 302258087616,1180840902336,4618922848536,
 18083348822516,70852652846320]

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