A088402 Duplicate of A077492.
2, 4, 6, 8, 1, 3, 5, 7, 9, 11, 13, 15, 17, 19, 39, 59, 79, 99, 119, 139, 159, 179, 199, 399
Offset: 1
This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.