A071221 Product of next n composite numbers.

4, 48, 1080, 60480, 5544000, 622702080, 106661318400, 28405593216000, 8247280940236800, 3294906785089920000, 1595754032207182848000, 840201424492187197440000, 653671274699431372640256000

Offset: 1

Author

Amarnath Murthy, May 17 2002

Keywords

• nonn

Examples

			a(1) = 4,a(2) = 6*8 = 48 and a(3) = 9*10*12 = 1080.
		

Links

• Harvey P. Dale, Table of n, a(n) for n = 1..224

Programs

Mathematica

nn=15;With[{comps=Complement[Rest[Range[(nn(nn+1))]],Prime[Range[ PrimePi[ (nn(nn+1))]]]]},Table[Times@@Take[comps,{(n(n-1))/2+1,(n(n+1))/2}],{n,nn}]] (* Harvey P. Dale, Dec 03 2012 *)
Module[{nn=200,cmps,len},cmps=Select[Range[nn],CompositeQ];len=Floor[(Sqrt[8 Length[cmps]+1]-1)/2];Times@@@TakeList[cmps,Range[len]]] (* Harvey P. Dale, May 25 2022 *)

Extensions

Corrected and extended by Lior Manor, Jun 02 2002