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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

%I

%S 1,6,5,7,143,323,23,899,65231,2491,3599,347261,583573,1009091,1317919,

%T 16637,428448457,4273697,5605027,1445140189,2445956099,3368562317,

%U 4927316309,6454166203,9473323417,13508676341,17347785757,8989229423381

%N Product of primes in the range [T(n-1} + 1, T(n - 1) + n], where T(n) is the n-th triangular number.

%e a(5) = 11*13 = 143.

%t 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 *)

%Y Cf. A093455, A093456.

%K nonn

%O 1,2

%A _Amarnath Murthy_, Apr 03 2004

%E More terms from _Ryan Propper_, Jun 22 2005

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Last modified October 27 03:29 EDT 2021. Contains 348270 sequences. (Running on oeis4.)