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A148680 as a simple table

n a(n)
0 1
1 1
2 3
3 7
4 21
5 73
6 245
7 793
8 2815
9 10075
10 36727
11 137411
12 511099
13 1902023
14 7265539
15 27944559
16 107626613
17 418427913
18 1633245101
19 6388652625
20 25192946761
21 99781420877
22 395823365473
23 1577503839685
24 6310009049517
25 25281085381601
26 101614792870501
27 409704814929945
28 1654942675306197

[1,1,3,7,21,73,245,793,2815,10075,36727,137411,
 511099,1902023,7265539,27944559,107626613,
 418427913,1633245101,6388652625,25192946761,
 99781420877,395823365473,1577503839685,
 6310009049517,25281085381601,101614792870501,
 409704814929945,1654942675306197]

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Last modified November 29 13:17 EST 2021. Contains 349416 sequences. (Running on oeis4.)