Prime islands: for n >= 2, a(n) = least prime whose adjacent primes are exactly 2n apart; a(1) = 3 by convention.

A046931

Prime islands: for n >= 2, a(n) = least prime whose adjacent primes are exactly 2n apart; a(1) = 3 by convention.

Terms

    a(0) =3a(1) =5a(2) =7a(3) =29a(4) =23a(5) =53a(6) =89a(7) =223a(8) =113a(9) =331a(10) =631a(11) =211a(12) =1381a(13) =1129a(14) =1637a(15) =4759a(16) =2579a(17) =3433a(18) =4297a(19) =1327a(20) =2179a(21) =2503a(22) =7993a(23) =5623a(24) =9587a(25) =17257a(26) =15859a(27) =14107a(28) =19609a(29) =34981

External references