OFFSET
1,1
LINKS
K. D. Bajpai, Table of n, a(n) for n = 1..8250
EXAMPLE
9413 is in the sequence because (83^2 + 89^2 + 97^2 + 101^2 + 103^2 + 107^2)/6 = 9413 which is prime.
25673 is in the sequence because (149^2 + 151^2 + 157^2 + 163^2 + 167^2 + 173^2)/6 = 25673 which is prime.
MAPLE
KD := proc() local a, b, d, e, f, g, h; a:=ithprime(n); b:=ithprime(n+1); d:=ithprime(n+2); e:=ithprime(n+3); f:=ithprime(n+4); h:=ithprime(n+5); g:=(a^2+b^2+d^2+e^2+f^2+h^2)/6; if g=floor(g) and isprime(g) then RETURN (g); fi; end: seq(KD(), n=2..1000);
CROSSREFS
KEYWORD
nonn
AUTHOR
K. D. Bajpai, Dec 26 2013
STATUS
approved