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A317890 as a simple table

n a(n)
1 0
2 1
3 1
4 2
5 5
6 16
7 45
8 123
9 340
10 946
11 2629
12 7298
13 20260
14 56254
15 156197
16 433691
17 1204165
18 3343437
19 9283266
20 25775569
21 71567464
22 198711505
23 551734847
24 1531926100
25 4253488018
26 11810073809
27 32791403882
28 91047370756
29 252798683166

[0,1,1,2,5,16,45,123,340,946,2629,7298,20260,
 56254,156197,433691,1204165,3343437,9283266,
 25775569,71567464,198711505,551734847,1531926100,
 4253488018,11810073809,32791403882,91047370756,
 252798683166]

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Last modified August 13 14:01 EDT 2022. Contains 356091 sequences. (Running on oeis4.)