a(n) is the smallest k such that prime(k+i) = 1 (mod 6) for i = 0, 1,...,n-1.

Terms

a(0) =4a(1) =11a(2) =36a(3) =271a(4) =271a(5) =271a(6) =2209a(7) =11199a(8) =13717a(9) =13717a(10) =34369a(11) =172146a(12) =172146a(13) =3094795a(14) =3094795a(15) =4308948a(16) =12762142a(17) =23902561a(18) =72084956a(19) =72084956a(20) =72084956a(21) =1052779161a(22) =1052779161a(23) =1857276773a(24) =1857276773a(25) =19398320447a(26) =57446769091a(27) =57446769091a(28) =57446769091