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A181066 as a simple table

n a(n)
0 1
1 1
2 2
3 7
4 31
5 157
6 865
7 5051
8 30774
9 193669
10 1250319
11 8240232
12 55239187
13 375624781
14 2585449450
15 17982937876
16 126222946496
17 893073250063
18 6363674671524
19 45631735776036
20 329065051395940
21 2385126419825231

[1,1,2,7,31,157,865,5051,30774,193669,1250319,
 8240232,55239187,375624781,2585449450,17982937876,
 126222946496,893073250063,6363674671524,
 45631735776036,329065051395940,2385126419825231]

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Last modified August 20 04:25 EDT 2019. Contains 326139 sequences. (Running on oeis4.)