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A250224 as a simple table

n a(n)
1 4
2 20
3 52
4 208
5 704
6 2720
7 10952
8 45888
9 195516
10 852260
11 3760588
12 16656832
13 73584076
14 323148964
15 1409241264
16 6099051768
17 26171960056
18 111250573364
19 468230400620
20 1951667338228
21 8063089066756
22 33057662096520
23 134680763671240

[4,20,52,208,704,2720,10952,45888,195516,852260,
 3760588,16656832,73584076,323148964,1409241264,
 6099051768,26171960056,111250573364,468230400620,
 1951667338228,8063089066756,33057662096520,
 134680763671240]

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Last modified April 19 16:38 EDT 2024. Contains 371794 sequences. (Running on oeis4.)