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.
| n | a(n) |
|---|---|
| 1 | 240 |
| 2 | 490 |
| 3 | 740 |
| 4 | 990 |
| 5 | 1240 |
| 6 | 1490 |
| 7 | 1740 |
| 8 | 1990 |
| 9 | 2240 |
| 10 | 2490 |
| 11 | 2740 |
| 12 | 2990 |
| 13 | 3240 |
| 14 | 3490 |
| 15 | 3740 |
| 16 | 3990 |
| 17 | 4240 |
| 18 | 4490 |
| 19 | 4740 |
| 20 | 4990 |
| 21 | 5240 |
| 22 | 5490 |
| 23 | 5740 |
| 24 | 5990 |
| 25 | 6240 |
| 26 | 6490 |
| 27 | 6740 |
| 28 | 6990 |
| 29 | 7240 |
| 30 | 7490 |
| 31 | 7740 |
| 32 | 7990 |
| 33 | 8240 |
| 34 | 8490 |
| 35 | 8740 |
| 36 | 8990 |
| 37 | 9240 |
| 38 | 9490 |
| 39 | 9740 |
| 40 | 9990 |
| 41 | 10240 |
| 42 | 10490 |