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A143560 as a simple table

n a(n)
0 1
1 1
2 3
3 6
4 16
5 38
6 110
7 276
8 818
9 2158
10 6528
11 17766
12 54622
13 151852
14 472674
15 1334886
16 4195328
17 11992486
18 37981982
19 109622228
20 349384626
21 1016304750
22 3256170672
23 9533400198
24 30680043630
25 90318157804
26 291763419458
27 862944630022

[1,1,3,6,16,38,110,276,818,2158,6528,17766,54622,
 151852,472674,1334886,4195328,11992486,37981982,
 109622228,349384626,1016304750,3256170672,
 9533400198,30680043630,90318157804,291763419458,
 862944630022]

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Last modified August 17 00:01 EDT 2022. Contains 356180 sequences. (Running on oeis4.)