A032712 Numbers k such that k prefixed by '4' and followed by '3' is prime.
3, 4, 6, 13, 15, 24, 25, 27, 28, 36, 37, 42, 46, 48, 49, 51, 52, 58, 60, 64, 66, 67, 70, 72, 73, 78, 79, 81, 90, 93, 94, 97, 99, 102, 111, 114, 118, 120, 121, 123, 124, 126, 133, 141, 144, 145, 151, 154, 159, 160, 181, 184, 186, 189, 190, 195, 198, 201, 202
Offset: 1
Extensions
Offset changed by Andrew Howroyd, Aug 13 2024