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A003121 formatted as a simple table:

n a(n)
1 1
2 1
3 2
4 12
5 286
6 33592
7 23178480
8 108995910720
9 3973186258569120
10 1257987096462161167200
11 3830793890438041335187545600
12 123051391839834932169117010215648000

[1,1,2,12,286,33592,23178480,108995910720,
 3973186258569120,1257987096462161167200,
 3830793890438041335187545600,
 123051391839834932169117010215648000]

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Last modified November 29 12:42 EST 2009. Contains 167602 sequences.


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