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A197746 as a simple table

n a(n)
1 3
2 31
3 212
4 1317
5 9499
6 64832
7 462515
8 3316363
9 23465652
10 167021811
11 1187571067
12 8438773594
13 60016633869
14 426656318067
15 3033239021542
16 21565974491771
17 153321389406967
18 1090053687664854
19 7749841908849879
20 55097853719155295

[3,31,212,1317,9499,64832,462515,3316363,23465652,
 167021811,1187571067,8438773594,60016633869,
 426656318067,3033239021542,21565974491771,
 153321389406967,1090053687664854,7749841908849879,
 55097853719155295]

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Last modified May 18 05:31 EDT 2022. Contains 353783 sequences. (Running on oeis4.)