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A042697 as a simple table

n a(n)
0 1
1 1
2 2
3 3
4 8
5 19
6 84
7 103
8 2968
9 3071
10 15252
11 33575
12 82402
13 115977
14 198379
15 314356
16 18431027
17 18745383
18 37176410
19 55921793
20 149019996
21 353961785
22 1564867136
23 1918828921
24 55292076924
25 57210905845

[1,1,2,3,8,19,84,103,2968,3071,15252,33575,82402,
 115977,198379,314356,18431027,18745383,37176410,
 55921793,149019996,353961785,1564867136,
 1918828921,55292076924,57210905845]

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Last modified June 19 13:50 EDT 2013. Contains 226411 sequences.