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A032056 formatted as a simple table:

n a(n)
1 1
2 1
3 1
4 4
5 8
6 38
7 326
8 2160
9 14092
10 119776
11 1726772
12 17087084
13 202819128
14 2671905592
15 43460010864
16 653865234996
17 10669423514948
18 193608386667944
19 3712432320889004
20 73424512657548576

[1,1,1,4,8,38,326,2160,14092,119776,1726772,
 17087084,202819128,2671905592,43460010864,
 653865234996,10669423514948,193608386667944,
 3712432320889004,73424512657548576]

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Last modified December 20 00:58 EST 2009. Contains 171054 sequences.


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