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A018012 formatted as a simple table:

n a(n)
0 1
1 2
2 5
3 13
4 30
5 71
6 169
7 397
8 934
9 2197
10 5165
11 12146
12 28561
13 67156
14 157907
15 371293
16 873034
17 2052795
18 4826809
19 11349443
20 26686340
21 62748517
22 147542764
23 346922420
24 815730721
25 1918055940
26 4509991465

[1,2,5,13,30,71,169,397,934,2197,5165,12146,28561,
 67156,157907,371293,873034,2052795,4826809,
 11349443,26686340,62748517,147542764,346922420,
 815730721,1918055940,4509991465]

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Last modified November 27 22:38 EST 2009. Contains 167602 sequences.


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