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A270598 as a simple table

n a(n)
0 1
1 1
2 1
3 3
4 14
5 70
6 364
7 2548
8 21104
9 189936
10 1830968
11 20140648
12 241712272
13 3142259536
14 43472528384
15 652087925760
16 10396900456448
17 176747307759616
18 3162885135453952
19 60094817573625088
20 1198006583353972736
21 25158138250433427456
22 551506339507727783936

[1,1,1,3,14,70,364,2548,21104,189936,1830968,
 20140648,241712272,3142259536,43472528384,
 652087925760,10396900456448,176747307759616,
 3162885135453952,60094817573625088,
 1198006583353972736,25158138250433427456,
 551506339507727783936]

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Last modified March 28 20:05 EDT 2024. Contains 371254 sequences. (Running on oeis4.)