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A238438 as a simple table

n a(n)
0 1
1 1
2 2
3 4
4 9
5 21
6 50
7 121
8 297
9 738
10 1853
11 4694
12 11982
13 30790
14 79586
15 206786
16 539784
17 1414905
18 3722776
19 9828501
20 26028969
21 69129150
22 184076913
23 491340306
24 1314412198
25 3523519135
26 9463563168
27 25462981484
28 68626114915
29 185246103584
30 500779373140
31 1355636896041
32 3674558399538
33 9972405246294
34 27095580261125

[1,1,2,4,9,21,50,121,297,738,1853,4694,11982,
 30790,79586,206786,539784,1414905,3722776,9828501,
 26028969,69129150,184076913,491340306,1314412198,
 3523519135,9463563168,25462981484,68626114915,
 185246103584,500779373140,1355636896041,
 3674558399538,9972405246294,27095580261125]

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Last modified November 29 08:47 EST 2020. Contains 338762 sequences. (Running on oeis4.)