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A022020 formatted as a simple table:

n a(n)
0 3
1 9
2 28
3 88
4 277
5 872
6 2746
7 8648
8 27236
9 85778
10 270153
11 850832
12 2679649
13 8439409
14 26579461
15 83710572
16 263641910
17 830325909
18 2615066456
19 8236010096
20 25938867499
21 81693057596
22 257287858063
23 810314166891

[3,9,28,88,277,872,2746,8648,27236,85778,270153,
 850832,2679649,8439409,26579461,83710572,
 263641910,830325909,2615066456,8236010096,
 25938867499,81693057596,257287858063,
 810314166891]

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Last modified November 27 14:50 EST 2009. Contains 167570 sequences.


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