A075591 Smallest squarefree number with n prime divisors which is the average of a twin prime pair.

6, 30, 462, 2310, 43890, 1138830, 17160990, 300690390, 15651726090, 239378649510, 12234189897930, 568815710072610, 19835154277048110, 693386350578511590, 37508276737897976010, 3338236629672919864890

Offset: 2

Author

Amarnath Murthy, Sep 26 2002

Keywords

• nonn

Examples

			a(4) = 462 because 462 = 2*3*7*11 and the twin primes are 461 and 463.
		

Crossrefs

Cf. A075590.

Cf. A073918 (least prime p such that p-1 has exactly n distinct prime factors), A098026 (least prime p such that p+1 has exactly n distinct prime factors).

Programs

Mathematica

Generate[pIndex_, i_] := Module[{p2, t}, p2=pIndex; While[p2[[i]]++; Do[p2[[j]]=p2[[i]]+j-i, {j, i+1, Length[p2]}]; t=Times@@Prime[p2]; t
				

Extensions

More terms from T. D. Noe, Dec 13 2004