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A180267
Prime(2*n+1)!/(60*prime(2*n-1)!).
1
1, 5544, 148512, 1211364, 5301223200, 67804092195840, 128850876, 8937268342895692800, 4383026968320, 2042765424, 147107459292393600, 40633707301699873935974400, 17158084020, 24300280368
OFFSET
1,2
COMMENTS
Oscillating sequence
LINKS
EXAMPLE
a(3)=prime(7)!/prime(5)!/60=355687428096000/39916800/60=148512
MATHEMATICA
#[[2]]/(60*#[[1]])&/@Partition[Prime[Range[1, 31, 2]]!, 2, 1] (* Harvey P. Dale, Mar 05 2017 *)
PROG
(PARI) a(n)=prime(2*n+1)!/prime(2*n-1)!/60
CROSSREFS
Sequence in context: A278012 A255100 A031795 * A203336 A045104 A043512
KEYWORD
easy,nonn
AUTHOR
Graziano Aglietti (mg5055(AT)mclink.it), Aug 23 2010
STATUS
approved