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A074210 formatted as a simple table:

n a(n)
1 1
2 4
3 12
4 30
5 272
6 4717
7 5402
8 18487
9 20115
10 28372
11 33998
12 111040
13 115170
14 456975
15 821586
16 1874660
17 4029676
18 4060029
19 59497900
20 232668002
21 313128068
22 529436220

[1,4,12,30,272,4717,5402,18487,20115,28372,33998,
 111040,115170,456975,821586,1874660,4029676,
 4060029,59497900,232668002,313128068,529436220]

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Last modified December 6 22:55 EST 2009. Contains 170429 sequences.


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