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A213905 as a simple table

n a(n)
2 1
3 1
4 1
5 2
6 4
7 9
8 20
9 47
10 112
11 274
12 678
13 1702
14 4314
15 11039
16 28460
17 73875
18 192884
19 506251
20 1334899
21 3534591
22 9394196
23 25052866
24 67019457
25 179793858
26 483591479
27 1303836901
28 3523141231
29 9539570474
30 25879559378
31 70332798052
32 191461351903
33 522012186777
34 1425327940690

[1,1,1,2,4,9,20,47,112,274,678,1702,4314,11039,
 28460,73875,192884,506251,1334899,3534591,9394196,
 25052866,67019457,179793858,483591479,1303836901,
 3523141231,9539570474,25879559378,70332798052,
 191461351903,522012186777,1425327940690]

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Last modified January 19 00:40 EST 2020. Contains 331030 sequences. (Running on oeis4.)