A079078 a(0) = 1, a(1) = 2; for n > 1, a(n) = prime(n)*a(n-2).

1, 2, 3, 10, 21, 110, 273, 1870, 5187, 43010, 150423, 1333310, 5565651, 54665710, 239322993, 2569288370, 12684118629, 151588013830, 773731236369, 10156396926610, 54934917782199, 741416975642530, 4339858504793721

Offset: 0

Author

Michael Joseph Halm, Feb 02 2003

Keywords

• nonn

Examples

			a(5)=110 because 2*5*11=110, the product of the first, third and fifth primes.
		

Crossrefs

Cf. A006882, A002110.

Programs

PARI

A079078(n)=prod(i=0,(n-1)\2,prime(n-2*i)) \\ - M. F. Hasler, May 04 2008

Extensions

Last term corrected by Jonathan Vos Post, Feb 09 2006

Edited and corrected by M. F. Hasler, May 06 2008