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A165658
Denominators of A002110 divided by A102647, starting from the second term of both.
3
1, 1, 1, 4, 6, 48, 64, 96, 576, 1728, 13824, 165888, 1036800, 9953280, 119439360, 297271296, 134369280000, 222953472000, 75246796800, 32105299968000, 229323571200, 568865783808000000, 125150472437760000, 6129819058176000
OFFSET
1,4
PROG
(PARI) a1(n)=prod(i=1, n, prime(i));
b1(n)=prod(i=1, n, prime(n+1)%prime(i));
a(n)=if(n<0, 0, denominator(a1(n)/b1(n)));
for(n=1, 25, print1(a(n) ", "))
CROSSREFS
KEYWORD
easy,nonn
AUTHOR
Creighton Dement, Sep 24 2009
STATUS
approved