a(n) is the least prime p such that the next prime after p with the same last digit as p is p+10*n.

Terms

a(0) =3a(1) =11a(2) =29a(3) =313a(4) =113a(5) =397a(6) =331a(7) =269a(8) =997a(9) =1129a(10) =2861a(11) =4271a(12) =4657a(13) =13451a(14) =10687a(15) =31489a(16) =14969a(17) =10891a(18) =38011a(19) =63113a(20) =39397a(21) =70621a(22) =55373a(23) =57331a(24) =46273a(25) =141863a(26) =78283a(27) =130987a(28) =99233a(29) =27283