First primes beginning a chain of 4 primes indexed equidistantly (n-th, (n+b)-th, (n+2b)-th, (n+3b)-th primes) whose sum of squares is the square of two times a prime and with b <= n.
A214265
First primes beginning a chain of 4 primes indexed equidistantly (n-th, (n+b)-th, (n+2b)-th, (n+3b)-th primes) whose sum of squares is the square of two times a prime and with b <= n.
Terms
- a(0) =137a(1) =199a(2) =223a(3) =773a(4) =2161a(5) =2477a(6) =3943a(7) =4079a(8) =4423a(9) =4603a(10) =6791a(11) =7297a(12) =7547a(13) =7559a(14) =12853a(15) =15299a(16) =17431a(17) =20807a(18) =22573a(19) =22637a(20) =25931a(21) =27179a(22) =31337a(23) =32027a(24) =32303a(25) =34403a(26) =36683a(27) =37573a(28) =38501a(29) =38671
External references
- oeis: A214265