a(n)-th and (a(n)+1)-st primes are the first pair of primes that differ by exactly 2n; a(n) = -1 if no such pair of primes exists.
A038664
a(n)-th and (a(n)+1)-st primes are the first pair of primes that differ by exactly 2n; a(n) = -1 if no such pair of primes exists.
Terms
- a(0) =2a(1) =4a(2) =9a(3) =24a(4) =34a(5) =46a(6) =30a(7) =282a(8) =99a(9) =154a(10) =189a(11) =263a(12) =367a(13) =429a(14) =590a(15) =738a(16) =217a(17) =1183a(18) =3302a(19) =2191a(20) =1879a(21) =1831a(22) =7970a(23) =3077a(24) =3427a(25) =2225a(26) =3793a(27) =8028a(28) =4612a(29) =4522
External references
- oeis: A038664