OFFSET
1,1
PROG
(PARI) a(n) = prime(n) + prime(n+1) - 2*n - 1 \\ Michel Marcus, Jun 03 2013
CROSSREFS
KEYWORD
easy,nonn
AUTHOR
Giovanni Teofilatto, Jul 05 2005
EXTENSIONS
Extended by Ray Chandler, Jul 10 2005
STATUS
approved