OFFSET
1,1
COMMENTS
The sequence contains all primes and their doubles and quadruples (except 2 and 4).
EXAMPLE
118 belongs to the sequence since 1682*(1682+118)=1682*1800=1740^2
CROSSREFS
KEYWORD
nonn
AUTHOR
Carmine Suriano, Nov 08 2010
EXTENSIONS
Name corrected by Robert Israel, Mar 04 2016
STATUS
approved