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A227665 as a simple table

n a(n)
0 1
1 6
2 44
3 320
4 2328
5 16936
6 123208
7 896328
8 6520712
9 47437640
10 345104904
11 2510609608
12 18264477064
13 132872558664
14 966636864776
15 7032203170760
16 51158695924872
17 372175277815624
18 2707544336559112
19 19697160911545032
20 143295215053933448
21 1042460827200624200

[1,6,44,320,2328,16936,123208,896328,6520712,
 47437640,345104904,2510609608,18264477064,
 132872558664,966636864776,7032203170760,
 51158695924872,372175277815624,2707544336559112,
 19697160911545032,143295215053933448,
 1042460827200624200]

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Last modified September 26 16:43 EDT 2020. Contains 337374 sequences. (Running on oeis4.)