Numbers k such that 7*10^k - 23 is prime.

Terms

a(0) =1a(1) =2a(2) =3a(3) =23a(4) =29a(5) =34a(6) =35a(7) =38a(8) =52a(9) =57a(10) =61a(11) =82a(12) =186a(13) =209a(14) =251a(15) =366a(16) =394a(17) =426a(18) =786a(19) =979a(20) =1382a(21) =2037a(22) =4557a(23) =8995a(24) =12774a(25) =19170a(26) =21828a(27) =23259a(28) =32003a(29) =41831