OFFSET
1,1
COMMENTS
No two consecutive positive integers m and m+1 are both non-coprime to any particular power of a prime.
EXAMPLE
22 is the 9th positive integer that is not a power of a prime. a(9) = 10 because neither 10 nor 10+1=11 is coprime to 22, and 10 and 11 are the smallest pair of consecutive positive integers where this is the case.
CROSSREFS
KEYWORD
nonn
AUTHOR
Leroy Quet, Aug 22 2009
EXTENSIONS
Extended by Ray Chandler, Mar 15 2010
STATUS
approved