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A080869 as a simple table

n a(n)
1 1
2 4
3 11
4 27
5 64
6 149
7 345
8 797
9 1839
10 4242
11 9782
12 22554
13 52001
14 119892
15 276417
16 637290
17 1469294
18 3387506
19 7810005
20 18006217
21 41513909
22 95711641
23 220666238
24 508753041
25 1172946341
26 2704265147
27 6234769423
28 14374459471
29 33140774109

[1,4,11,27,64,149,345,797,1839,4242,9782,22554,
 52001,119892,276417,637290,1469294,3387506,
 7810005,18006217,41513909,95711641,220666238,
 508753041,1172946341,2704265147,6234769423,
 14374459471,33140774109]

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Last modified February 25 04:32 EST 2020. Contains 332217 sequences. (Running on oeis4.)