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A148861 as a simple table

n a(n)
0 1
1 1
2 3
3 8
4 28
5 96
6 354
7 1276
8 4948
9 19152
10 76476
11 305204
12 1247268
13 5097039
14 21201259
15 88365760
16 372586056
17 1573678198
18 6711499316
19 28681918821
20 123466821593
21 532621054850
22 2310944389638
23 10046538677832
24 43887205445758
25 192093961273290
26 844068056785398
27 3715688970164365
28 16411219972733031

[1,1,3,8,28,96,354,1276,4948,19152,76476,305204,
 1247268,5097039,21201259,88365760,372586056,
 1573678198,6711499316,28681918821,123466821593,
 532621054850,2310944389638,10046538677832,
 43887205445758,192093961273290,844068056785398,
 3715688970164365,16411219972733031]

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Last modified September 25 03:24 EDT 2020. Contains 337333 sequences. (Running on oeis4.)