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A002137 formatted as a simple table:

n a(n)
0 1
1 0
2 1
3 1
4 6
5 22
6 130
7 822
8 6202
9 52552
10 499194
11 5238370
12 60222844
13 752587764
14 10157945044
15 147267180508
16 2282355168060
17 37655004171808
18 658906772228668
19 12188911634495388
20 237669544014377896
21 4871976826254018760
22 104742902332392298296

[1,0,1,1,6,22,130,822,6202,52552,499194,5238370,
 60222844,752587764,10157945044,147267180508,
 2282355168060,37655004171808,658906772228668,
 12188911634495388,237669544014377896,
 4871976826254018760,104742902332392298296]

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Last modified December 2 11:54 EST 2009. Contains 167921 sequences.


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