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A149905 as a simple table

n a(n)
0 1
1 2
2 5
3 14
4 48
5 166
6 613
7 2280
8 8976
9 35247
10 143382
11 582249
12 2431920
13 10125351
14 43070020
15 182684943
16 788474211
17 3393379082
18 14813919095
19 64502077124
20 284229195699
21 1249444788695
22 5548487320409
23 24585551900503
24 109894795683645
25 490239938536434
26 2203608385587727
27 9887231443885407

[1,2,5,14,48,166,613,2280,8976,35247,143382,
 582249,2431920,10125351,43070020,182684943,
 788474211,3393379082,14813919095,64502077124,
 284229195699,1249444788695,5548487320409,
 24585551900503,109894795683645,490239938536434,
 2203608385587727,9887231443885407]

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Last modified June 18 12:23 EDT 2021. Contains 345106 sequences. (Running on oeis4.)