A032687 Numbers k such that k surrounded by digit '3' is a lucky number.
0, 9, 12, 13, 15, 16, 18, 21, 22, 24, 31, 36, 40, 43, 45, 60, 61, 63, 66, 75, 76, 79, 84, 87, 94, 100, 103, 109, 114, 126, 129, 130, 136, 138, 145, 157, 163, 171, 172, 177, 186, 189, 190, 195, 201, 205, 213, 217, 222, 237, 240, 243, 253, 256, 259
Offset: 1