

A093457


Product of primes in the range [T(n1) + 1, T(n  1) + n], where T(n) is the nth 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
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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



KEYWORD

nonn


AUTHOR



EXTENSIONS



STATUS

approved



