Numbers k such that k-1, k+1, 2*k-1, 2*k+1, 4*k-1 and 4*k+1 are all prime.

Terms

a(0) =211050a(1) =248640a(2) =253680a(3) =410340a(4) =507360a(5) =605640a(6) =1121190a(7) =1138830a(8) =1262100a(9) =2162580a(10) =2172870a(11) =2277660a(12) =4070220a(13) =6305460a(14) =7671510a(15) =11659410a(16) =12577110a(17) =14203770a(18) =14862120a(19) =17472840a(20) =18728640a(21) =18798360a(22) =20520570a(23) =21140700