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A106804 as a simple table

n a(n)
0 0
1 2
2 11
3 56
4 285
5 1452
6 7406
7 37816
8 193295
9 989002
10 5065051
11 25963276
12 133199780
13 683904902
14 3514119571
15 18069536436
16 92975574865
17 478701242652
18 2466137174466
19 12711910214796
20 65558648361175
21 338267429484502

[0,2,11,56,285,1452,7406,37816,193295,989002,
 5065051,25963276,133199780,683904902,3514119571,
 18069536436,92975574865,478701242652,
 2466137174466,12711910214796,65558648361175,
 338267429484502]

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Last modified March 7 13:24 EST 2021. Contains 341886 sequences. (Running on oeis4.)