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A107683 formatted as a simple table:

n a(n)
1 1
2 1
3 3
4 11
5 35
6 114
7 407
8 1486
9 5414
10 19923
11 74230
12 278462
13 1049318
14 3972395
15 15101658
16 57607431
17 220391316
18 845366406
19 3250192681
20 12521965697 

[1,1,3,11,35,114,407,1486,5414,19923,74230,278462,
 1049318,3972395,15101658,57607431,220391316,
 845366406,3250192681,12521965697]

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

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