OFFSET
1,1
COMMENTS
Or, least composite k such that k is coprime to the n-1 numbers k+1 ... k+n-1. E.g. a(4) = 25 because 25 is coprime to 26, 27 and 28. - Amarnath Murthy, Apr 20 2004
FORMULA
a(n)=nextprime(n)^2=A007918(n)^2
CROSSREFS
KEYWORD
easy,nonn
AUTHOR
Benoit Cloitre, Apr 21 2002
EXTENSIONS
Edited by David Wasserman, Apr 23 2007
STATUS
approved