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A126725 as a simple table

n a(n)
1 0
2 1
3 3
4 12
5 40
6 195
7 861
8 5488
9 31032
10 247005
11 1706815
12 16302396
13 133131648
14 1483518127
15 13978823145
16 178022175360
17 1901119947856
18 27237392830233
19 325091511083547
20 5175104637744460
21 68269217327545080
22 1195449171318970491 

[0,1,3,12,40,195,861,5488,31032,247005,1706815,
 16302396,133131648,1483518127,13978823145,
 178022175360,1901119947856,27237392830233,
 325091511083547,5175104637744460,
 68269217327545080,1195449171318970491]

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Last modified June 5 16:08 EDT 2024. Contains 373107 sequences. (Running on oeis4.)