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A113159
Smallest n-semiprime equal to the product of increasing distinct primes.
0
6, 1155, 86822723, 39181802686993, 35597295809230452047, 106599435598498872379635683
OFFSET
1,1
EXAMPLE
a(1) = 6 is 1-semiprime equal 2*3;
a(2) = 1155 is 2-semiprime equal (3*5)*(7*11);
a(3) = 86822723 is 3-semiprime equal (11*13)*(17*19)*(23*29).
CROSSREFS
Sequence in context: A267071 A219165 A185537 * A159717 A160857 A160005
KEYWORD
nonn
AUTHOR
Giovanni Teofilatto, Jan 05 2006
STATUS
approved