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A068051 formatted as a simple table:

n a(n)
1 1
2 2
3 4
4 9
5 20
6 49
7 118
8 300
9 765
10 1998
11 5255
12 14027
13 37670
14 102095
15 278262
16 763022
17 2101905
18 5816142
19 16153148
20 45017423
21 125836711
22 352723949
23 991143727
24 2791422887
25 7877935985
26 22275473767
27 63096075118
28 179012076933

[1,2,4,9,20,49,118,300,765,1998,5255,14027,37670,
 102095,278262,763022,2101905,5816142,16153148,
 45017423,125836711,352723949,991143727,2791422887,
 7877935985,22275473767,63096075118,179012076933]

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Last modified December 15 00:47 EST 2009. Contains 170825 sequences.


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