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A001851 as a simple table

n a(n)
1 0
2 1
3 2
4 5
5 9
6 21
7 44
8 103
9 232
10 571
11 1368
12 3441
13 8653
14 22263
15 57518
16 150733
17 396937
18 1054540
19 2815453
20 7562159
21 20399714
22 55280532
23 150356806
24 410432671
25 1123902587
26 3086827578
27 8500975970
28 23470712241
29 64952794778
30 180144093389

[0,1,2,5,9,21,44,103,232,571,1368,3441,8653,22263,
 57518,150733,396937,1054540,2815453,7562159,
 20399714,55280532,150356806,410432671,1123902587,
 3086827578,8500975970,23470712241,64952794778,
 180144093389]

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Last modified January 17 18:48 EST 2019. Contains 319251 sequences. (Running on oeis4.)