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A003540 formatted as a simple table:

n a(n)
1 1
2 7
3 23
4 89
5 161
6 623
7 2047
8 14329
9 599479
10 4196353
11 13788017
12 53353631
13 96516119
14 373475417
15 1227133513
16 8589934591

[1,7,23,89,161,623,2047,14329,599479,4196353,
 13788017,53353631,96516119,373475417,1227133513,
 8589934591]

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Last modified December 6 13:45 EST 2009. Contains 170429 sequences.


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