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A126943 as a simple table

n a(n)
0 0
1 0
2 4
3 14
4 36
5 116
6 378
7 1178
8 3700
9 11694
10 36852
11 116082
12 365886
13 1153178
14 3634154
15 11453184
16 36095524
17 113756584
18 358508862
19 1129858168
20 3560801564
21 11222032838
22 35366766278
23 111460034016
24 351271552234
25 1107048863804
26 3488916716866
27 10995485596894

[0,0,4,14,36,116,378,1178,3700,11694,36852,116082,
 365886,1153178,3634154,11453184,36095524,
 113756584,358508862,1129858168,3560801564,
 11222032838,35366766278,111460034016,351271552234,
 1107048863804,3488916716866,10995485596894]

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Last modified November 25 20:53 EST 2020. Contains 338627 sequences. (Running on oeis4.)