OFFSET
1,1
COMMENTS
Indices of the initial primes of series of 70 successive primes are (A166255): 71,201,1024,1594,10915,36934,51050,60054,60914,71822,80331,85230,92916.
LINKS
Zak Seidov, Table of n, a(n) for n = 1..100
EXAMPLE
200^2=prime(71)+...+prime(71+69),
322^2=prime(201)+...+prime(201+69),
770^2=prime(1024)+...+prime(1024+69).
PROG
(PARI) lista(nn) = {pr = primes(nn); for (i = 1, nn-69, s = sum(k=i, i+69, pr[k]); if (issquare(s), print1(sqrtint(s), ", ")); ); } \\ Michel Marcus, Oct 15 2013
CROSSREFS
KEYWORD
nonn
AUTHOR
Zak Seidov, Oct 10 2009
EXTENSIONS
a(38)-a(40) from Michel Marcus, Oct 15 2013
STATUS
approved