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A091142 as a simple table

n a(n)
1 1
2 2
3 6
4 18
5 56
6 172
7 532
8 1640
9 5064
10 15624
11 48224
12 148816
13 459280
14 1417376
15 4374240
16 13499424
17 41661056
18 128571328
19 396788032
20 1224539264
21 3779088000
22 11662756992
23 35992787456
24 111078426880
25 342802489600
26 1057933111808
27 3264919328256
28 10075966124544

[1,2,6,18,56,172,532,1640,5064,15624,48224,148816,
 459280,1417376,4374240,13499424,41661056,
 128571328,396788032,1224539264,3779088000,
 11662756992,35992787456,111078426880,342802489600,
 1057933111808,3264919328256,10075966124544]

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Last modified July 29 08:28 EDT 2021. Contains 346340 sequences. (Running on oeis4.)