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A061215
a(n)= product of all odd composite numbers between n-th prime and (n+1)-st prime.
2
1, 1, 1, 9, 1, 15, 1, 21, 675, 1, 1155, 39, 1, 45, 2499, 3135, 1, 4095, 69, 1, 5775, 81, 7395, 803985, 99, 1, 105, 1, 111, 2978730129375, 129, 17955, 1, 429774345, 1, 23715, 25599, 165, 28899, 30975, 1, 1196537265, 1, 195, 1, 361878338745
OFFSET
1,4
LINKS
EXAMPLE
a(9) = 675 = 25 * 27, as 23 is the 9th prime and 29 is the 10th prime.
PROG
(PARI) for(n=1, 60, p=1:for(k=prime(n)+1, prime(n+1)-1, if(k%2==1, p=p*k)):print1(p", "))
(PARI) { n=0; q=2; forprime (p=3, prime(2001), a=1; for (i=q + 1, p - 1, if (i%2==1, a*=i)); q=p; write("b061215.txt", n++, " ", a) ) } \\ Harry J. Smith, Jul 19 2009
CROSSREFS
Sequence in context: A107829 A062357 A348974 * A072448 A145966 A349143
KEYWORD
nonn
AUTHOR
Amarnath Murthy, Apr 22 2001
EXTENSIONS
More terms from Ralf Stephan, Mar 31 2003
First term removed by Harry J. Smith, Jul 19 2009
STATUS
approved