OFFSET
1,2
COMMENTS
a(n) = A164799(n) + n -1.
EXAMPLE
Consider the products of consecutive integers, m!/9!, m >= 10. First, 10 is divisible by 2 and 5, but there is a prime gap since 3 is missing from the factorization. 10*11 is divisible by 2, 5, and 11, but 3 and 7 are missing. 10*11*12 is divisible by 2, 3, 5, and 11, but 7 is missing. 10*11*12*13 is divisible by all primes up to 13, except 7. But 10*11*12*13*14 is indeed divisible by every prime from 2 to 13. So a(10) = 14.
CROSSREFS
KEYWORD
nonn
AUTHOR
Leroy Quet, Aug 26 2009
EXTENSIONS
Terms beyond a(13) from R. J. Mathar, Feb 27 2010
STATUS
approved