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A145548 formatted as a simple table:

n a(n)
1 1
2 1
3 2
4 4
5 9
6 20
7 48
8 115
9 286
10 719
11 1842
12 4765
13 12482
14 32957
15 87756
16 235198
17 634261
18 1719312
19 4682952
20 12808650
21 35168306
22 96893138
23 267794711
24 742260014
25 2062792103 

[1,1,2,4,9,20,48,115,286,719,1842,4765,12482,
 32957,87756,235198,634261,1719312,4682952,
 12808650,35168306,96893138,267794711,742260014,
 2062792103]

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

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