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A022558 formatted as a simple table:

n a(n)
0 1
1 1
2 2
3 6
4 23
5 103
6 512
7 2740
8 15485
9 91245
10 555662
11 3475090
12 22214707
13 144640291
14 956560748
15 6411521056
16 43478151737
17 297864793993
18 2059159989914
19 14350039389022
20 100726680316559
21 711630547589023
22 5057282786190872

[1,1,2,6,23,103,512,2740,15485,91245,555662,
 3475090,22214707,144640291,956560748,6411521056,
 43478151737,297864793993,2059159989914,
 14350039389022,100726680316559,711630547589023,
 5057282786190872]

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.


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