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A010907 formatted as a simple table:

n a(n)
0 4
1 19
2 90
3 426
4 2016
5 9541
6 45154
7 213697
8 1011348
9 4786332
10 22651920
11 107203069
12 507352048
13 2401107571
14 11363544486
15 53779407822
16 254517831936
17 1204537747753
18 5700626846950
19 26978935702753

[4,19,90,426,2016,9541,45154,213697,1011348,
 4786332,22651920,107203069,507352048,2401107571,
 11363544486,53779407822,254517831936,
 1204537747753,5700626846950,26978935702753]

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Last modified November 30 13:13 EST 2009. Contains 167758 sequences.


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