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A147227 formatted as a simple table:

n a(n)
1 1
2 1
3 1
4 1
5 1
6 1
7 2
8 3
9 6
10 9
11 16
12 23
13 72
14 177
15 631
16 1684
17 5696
18 15819
19 69884
20 263612
21 1492069
22 6667995
23 40872228
24 203062570
25 1480955534
26 9070964673
27 81908729534

[1,1,1,1,1,1,2,3,6,9,16,23,72,177,631,1684,5696,
 15819,69884,263612,1492069,6667995,40872228,
 203062570,1480955534,9070964673,81908729534]

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Last modified December 18 21:37 EST 2009. Contains 171024 sequences.


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