Numbers k such that there is no prime between 10*k and 10*k+9.

Terms

a(0) =20a(1) =32a(2) =51a(3) =53a(4) =62a(5) =84a(6) =89a(7) =107a(8) =113a(9) =114a(10) =126a(11) =133a(12) =134a(13) =135a(14) =141a(15) =146a(16) =150a(17) =164a(18) =167a(19) =168a(20) =171a(21) =176a(22) =179a(23) =185a(24) =189a(25) =192a(26) =196a(27) =204a(28) =207a(29) =210