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A001260 formatted as a simple table:

n a(n)
5 1
6 5
7 45
8 385
9 3710
10 38934
11 444990
12 5506710
13 73422855
14 1049946755
15 16035550531
16 260577696015
17 4489954146860
18 81781307674780
19 1570201107355980
20 31698434854748604
21 671260973394676605
22 14879618243581997745

[1,5,45,385,3710,38934,444990,5506710,73422855,
 1049946755,16035550531,260577696015,4489954146860,
 81781307674780,1570201107355980,31698434854748604,
 671260973394676605,14879618243581997745]

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Last modified December 20 00:58 EST 2009. Contains 171054 sequences.


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