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A161206 formatted as a simple table:

n a(n)
0 0
1 1
2 3
3 7
4 13
5 21
6 31
7 43
8 57
9 69
10 81
11 99
12 123
13 153
14 183
15 211
16 241
17 261
18 273

[0,1,3,7,13,21,31,43,57,69,81,99,123,153,183,211,
 241,261,273]

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Last modified December 3 22:15 EST 2009. Contains 170310 sequences.


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