A180267 Prime(2*n+1)!/(60*prime(2*n-1)!).

1, 5544, 148512, 1211364, 5301223200, 67804092195840, 128850876, 8937268342895692800, 4383026968320, 2042765424, 147107459292393600, 40633707301699873935974400, 17158084020, 24300280368

Offset: 1

Author

Graziano Aglietti (mg5055(AT)mclink.it), Aug 23 2010

Keywords

• easy
• nonn

Comments

Oscillating sequence

Examples

			a(3)=prime(7)!/prime(5)!/60=355687428096000/39916800/60=148512
		

Links

• Harvey P. Dale, Table of n, a(n) for n = 1..1000

Crossrefs

Cf. A178614

Programs

Mathematica

#[[2]]/(60*#[[1]])&/@Partition[Prime[Range[1,31,2]]!,2,1] (* Harvey P. Dale, Mar 05 2017 *)

PARI

a(n)=prime(2*n+1)!/prime(2*n-1)!/60