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A203507 as a simple table

n a(n)
0 1
1 3
2 15
3 82
4 504
5 3198
6 21592
7 147570
8 1045221
9 7464052
10 54549804
11 400487997
12 2990765270
13 22396990002
14 169881957174
15 1291189065086
16 9910770901971
17 76178174174205
18 590312326353680
19 4578346159792815
20 35745960436892046
21 279290158338688617

[1,3,15,82,504,3198,21592,147570,1045221,7464052,
 54549804,400487997,2990765270,22396990002,
 169881957174,1291189065086,9910770901971,
 76178174174205,590312326353680,4578346159792815,
 35745960436892046,279290158338688617]

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Last modified February 23 05:35 EST 2024. Contains 370267 sequences. (Running on oeis4.)