a(n) is the least k such that the residues mod 3 of the primes prime(k), prime(k+1),... include a string of n 1's followed by 2.

A391807

a(n) is the least k such that the residues mod 3 of the primes prime(k), prime(k+1),... include a string of n 1's followed by 2.

Terms

    a(0) =4a(1) =11a(2) =36a(3) =273a(4) =272a(5) =271a(6) =2209a(7) =11199a(8) =13718a(9) =13717a(10) =34369a(11) =172147a(12) =172146a(13) =3094796a(14) =3094795a(15) =4308948a(16) =12762142a(17) =23902561a(18) =72084958a(19) =72084957a(20) =72084956a(21) =1052779162a(22) =1052779161a(23) =1857276774a(24) =1857276773a(25) =19398320447a(26) =57446769095a(27) =57446769094a(28) =57446769093a(29) =57446769092

External references