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A001170 as a simple table

n a(n)
1 1
2 2
3 6
4 19
5 63
6 216
7 760
8 2723
9 9880
10 36168
11 133237
12 492993
13 1829670
14 6804267
15 25336611
16 94416842
17 351989967
18 1312471879
19 4894023222
20 18248301701
21 68036380665
22 253638655582
23 945464013411
24 3523978989671
25 13133649924269

[1,2,6,19,63,216,760,2723,9880,36168,133237,
 492993,1829670,6804267,25336611,94416842,
 351989967,1312471879,4894023222,18248301701,
 68036380665,253638655582,945464013411,
 3523978989671,13133649924269]

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Last modified October 22 07:29 EDT 2019. Contains 328315 sequences. (Running on oeis4.)