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A026653 as a simple table

n a(n)
2 1
3 7
4 30
5 148
6 610
7 2823
8 11690
9 52952
10 221094
11 992190
12 4173708
13 18642456
14 78906516
15 351537963
16 1495497690
17 6652572976
18 28420125190
19 126308309058
20 541492971140
21 2405203008440
22 10341957297084
23 45920564571398
24 197952999374468

[1,7,30,148,610,2823,11690,52952,221094,992190,
 4173708,18642456,78906516,351537963,1495497690,
 6652572976,28420125190,126308309058,541492971140,
 2405203008440,10341957297084,45920564571398,
 197952999374468]

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Last modified September 22 09:27 EDT 2021. Contains 347606 sequences. (Running on oeis4.)