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A151408 as a simple table

n a(n)
0 1
1 1
2 2
3 5
4 12
5 34
6 97
7 287
8 887
9 2761
10 8833
11 28635
12 93897
13 312257
14 1046368
15 3539825
16 12066283
17 41387197
18 142887038
19 495828190
20 1729130445
21 6057385620
22 21303526484
23 75209346309
24 266413953357
25 946691896721
26 3373935569795
27 12056675023892
28 43193395482458
29 155104308523072
30 558187652361721
31 2012940278579932

[1,1,2,5,12,34,97,287,887,2761,8833,28635,93897,
 312257,1046368,3539825,12066283,41387197,
 142887038,495828190,1729130445,6057385620,
 21303526484,75209346309,266413953357,946691896721,
 3373935569795,12056675023892,43193395482458,
 155104308523072,558187652361721,2012940278579932]

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Last modified November 30 18:59 EST 2020. Contains 338808 sequences. (Running on oeis4.)