OFFSET
1,1
LINKS
Colin Barker, Table of n, a(n) for n = 1..1400
EXAMPLE
149 is in the sequence because 149 = 7^2 + 4*5^2 and 149, 7 and 5 are all primes.
MATHEMATICA
Select[#1^2 + 4 #2^2 & @@ # & /@ Tuples[Prime@ Range@ 60, 2], PrimeQ] // Sort (* Michael De Vlieger, Jul 29 2015 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
Colin Barker, Jul 29 2015
STATUS
approved