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A173412 as a simple table

n a(n)
1 4
2 12
3 34
4 96
5 262
6 706
7 1866
8 4876
9 12590
10 32220
11 81780
12 206182
13 516682
14 1288100
15 3196414
16 7899664
17 19452002
18 47741832
19 116827972
20 285121530
21 694145540
22 1686165640
23 4087501476
24 9889956114
25 23887544730
26 57602999360
27 138696210062
28 333483756402
29 800784138674
30 1920539773188
31 4600776445384
32 11009534409116
33 26318680827474
34 62855267076802
35 149976974496002
36 357547693790338
37 851705230512838
38 2027255882196068

[4,12,34,96,262,706,1866,4876,12590,32220,81780,
 206182,516682,1288100,3196414,7899664,19452002,
 47741832,116827972,285121530,694145540,1686165640,
 4087501476,9889956114,23887544730,57602999360,
 138696210062,333483756402,800784138674,
 1920539773188,4600776445384,11009534409116,
 26318680827474,62855267076802,149976974496002,
 357547693790338,851705230512838,2027255882196068]

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Last modified August 19 06:10 EDT 2022. Contains 356216 sequences. (Running on oeis4.)