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A006930 formatted as a simple table:

n a(n)
0 1
1 2
2 5
3 14
4 42
5 131
6 420
7 1376
8 4589
9 15537
10 53293
11 184881
12 647752
13 2289215
14 8152147
15 29226618
16 105408688
17 382193502
18 1392377762
19 5094356032
20 18711122069
21 68965586862
22 255006331944
23 945662753514

[1,2,5,14,42,131,420,1376,4589,15537,53293,184881,
 647752,2289215,8152147,29226618,105408688,
 382193502,1392377762,5094356032,18711122069,
 68965586862,255006331944,945662753514]

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


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