OFFSET
1,1
COMMENTS
a(6) through a(21) have been certified prime with Primo. - Rick L. Shepherd, Jun 03 2002
FORMULA
a(n) = A121172(n)*10^n + 1. - Ray Chandler, Feb 10 2009
PROG
(PARI) b(n, k) = k*10^n+1 for(n=1, 25, k=1; while(!isprime(b(n, k)), k++); print1(b(n, k), ", "))
CROSSREFS
KEYWORD
nonn
AUTHOR
Amarnath Murthy, May 15 2002
EXTENSIONS
More terms from Rick L. Shepherd, Jun 03 2002
STATUS
approved