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A117641 formatted as a simple table:

n a(n)
0 1
1 0
2 1
3 3
4 11
5 42
6 167
7 684
8 2867
9 12240
10 53043
11 232731
12 1031829
13 4615542
14 20805081
15 94410363
16 430945739
17 1977366192
18 9115261211
19 42195093993
20 196060049129
21 914110333422
22 4275222950221
23 20051858039718
24 94294269673861

[1,0,1,3,11,42,167,684,2867,12240,53043,232731,
 1031829,4615542,20805081,94410363,430945739,
 1977366192,9115261211,42195093993,196060049129,
 914110333422,4275222950221,20051858039718,
 94294269673861]

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Last modified December 4 08:07 EST 2009. Contains 170310 sequences.


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