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A104455 formatted as a simple table:

n a(n)
0 1
1 4
2 17
3 77
4 371
5 1890
6 10095
7 56040
8 320795
9 1881524
10 11250827
11 68330773
12 420314629
13 2612922694
14 16389162537
15 103587298965
16 659071002195
17 4217699773140
18 27129590096595
19 175303621195647
20 1137400502295081

[1,4,17,77,371,1890,10095,56040,320795,1881524,
 11250827,68330773,420314629,2612922694,
 16389162537,103587298965,659071002195,
 4217699773140,27129590096595,175303621195647,
 1137400502295081]

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Last modified December 17 23:40 EST 2009. Contains 171025 sequences.


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