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A140122
Negative of numerator of Sum_{k=1..n} (-1)^k / semiprime(k).
+0
2
1, 1, 7, 17, 209, 25, 37, 281, 9797, 92711, 120011, 1589737, 2027317, 30861373, 38322673, 735926129, 6107595203, 5188977503, 6040786643, 5218865543, 174771852097, 4738609625857, 5386574286277, 4776172794577, 197777244862999
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Maintained by
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Last modified December 4 12:48 EST 2009. Contains 170310 sequences.
AT&T Labs Research
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