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A056448 formatted as a simple table:

n a(n)
1 0
2 0
3 0
4 0
5 0
6 1
7 1
8 18
9 59
10 630
11 1681
12 28866
13 60083
14 757576
15 3514504
16 21423984
17 64372109
18 1024999170
19 2026631203
20 26920954613
21 105501588414
22 742299897060
23 1974251382095
24 31721456288956
25 74052852505684

[0,0,0,0,0,1,1,18,59,630,1681,28866,60083,757576,
 3514504,21423984,64372109,1024999170,2026631203,
 26920954613,105501588414,742299897060,
 1974251382095,31721456288956,74052852505684]

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Last modified December 4 15:11 EST 2009. Contains 170347 sequences.


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