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A005409 as a simple table

n a(n)
1 1
2 1
3 4
4 11
5 28
6 69
7 168
8 407
9 984
10 2377
11 5740
12 13859
13 33460
14 80781
15 195024
16 470831
17 1136688
18 2744209
19 6625108
20 15994427
21 38613964
22 93222357
23 225058680
24 543339719
25 1311738120
26 3166815961
27 7645370044
28 18457556051
29 44560482148
30 107578520349
31 259717522848

[1,1,4,11,28,69,168,407,984,2377,5740,13859,33460,
 80781,195024,470831,1136688,2744209,6625108,
 15994427,38613964,93222357,225058680,543339719,
 1311738120,3166815961,7645370044,18457556051,
 44560482148,107578520349,259717522848]

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Last modified November 17 08:39 EST 2019. Contains 329217 sequences. (Running on oeis4.)