OFFSET
1,2
LINKS
Harvey P. Dale, Table of n, a(n) for n = 1..1000
MATHEMATICA
Position[Accumulate[Select[Prime[Range[3000]], Mod[#, 10]==7&]], _?(PrimeQ[ #]&)]//Flatten (* Harvey P. Dale, Dec 27 2021 *)
CROSSREFS
KEYWORD
easy,base,less,nonn
AUTHOR
Tomas Xordan, May 14 2007
STATUS
approved