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A211308 as a simple table

n a(n)
0 1
1 4
2 14
3 50
4 182
5 668
6 2466
7 9156
8 34186
9 128308
10 483880
11 1832836
12 6970186
13 26603704
14 101875408
15 391282036
16 1506881410
17 5817328360
18 22507181024
19 87252861140
20 338857359792
21 1318133110848
22 5135008140588
23 20031069560880
24 78234143417074
25 305894382472336
26 1197260125948652
27 4690409375327972

[1,4,14,50,182,668,2466,9156,34186,128308,483880,
 1832836,6970186,26603704,101875408,391282036,
 1506881410,5817328360,22507181024,87252861140,
 338857359792,1318133110848,5135008140588,
 20031069560880,78234143417074,305894382472336,
 1197260125948652,4690409375327972]

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Last modified September 24 14:00 EDT 2020. Contains 337321 sequences. (Running on oeis4.)