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A118455
a(1)=1, a(n) = product{k=2..n}P(k), where P(k) is the largest prime <= k.
+0
6
1, 2, 6, 18, 90, 450, 3150, 22050, 154350, 1080450, 11884950, 130734450, 1699547850, 22094122050, 287223586650, 3733906626450, 63476412649650, 1079099015044050, 20502881285836950, 389554744430902050
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Maintained by
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Last modified December 10 12:37 EST 2009. Contains 170569 sequences.
AT&T Labs Research
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