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 | 15 |
| 2 | 55 |
| 3 | 105 |
| 4 | 120 |
| 5 | 253 |
| 6 | 595 |
| 7 | 1225 |
| 8 | 1485 |
| 9 | 2080 |
| 10 | 2211 |
| 11 | 3321 |
| 12 | 4371 |
| 13 | 5460 |
| 14 | 6786 |
| 15 | 7381 |
| 16 | 7503 |
| 17 | 10731 |
| 18 | 11935 |
| 19 | 12246 |
| 20 | 16290 |
| 21 | 18915 |
| 22 | 24531 |
| 23 | 24753 |
| 24 | 27966 |
| 25 | 36585 |
| 26 | 44850 |
| 27 | 51360 |
| 28 | 55278 |
| 29 | 55945 |
| 30 | 56953 |
| 31 | 60031 |
| 32 | 64980 |
| 33 | 68265 |
| 34 | 69006 |
| 35 | 70125 |
| 36 | 75078 |
| 37 | 86736 |
| 38 | 87153 |
| 39 | 92235 |
| 40 | 94830 |
| 41 | 98790 |
| 42 | 111628 |