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A093457 Product of primes in the range [T(n-1) + 1, T(n - 1) + n], where T(n) is the n-th triangular number. 0
1, 6, 5, 7, 143, 323, 23, 899, 65231, 2491, 3599, 347261, 583573, 1009091, 1317919, 16637, 428448457, 4273697, 5605027, 1445140189, 2445956099, 3368562317, 4927316309, 6454166203, 9473323417, 13508676341, 17347785757, 8989229423381 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
LINKS
EXAMPLE
a(5) = 11*13 = 143.
MATHEMATICA
Do[k = 1; Do[If[PrimeQ[i], k = k*i], {i, Binomial[n, 2] + 1, Binomial[n, 2] + n}]; Print[k], {n, 1, 30}] (* Ryan Propper, Jun 22 2005 *)
CROSSREFS
Sequence in context: A266077 A019167 A019324 * A195446 A262993 A201764
KEYWORD
nonn
AUTHOR
Amarnath Murthy, Apr 03 2004
EXTENSIONS
More terms from Ryan Propper, Jun 22 2005
STATUS
approved

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Last modified May 28 01:34 EDT 2024. Contains 372900 sequences. (Running on oeis4.)