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 | 20 |
| 2 | 95 |
| 3 | 220 |
| 4 | 395 |
| 5 | 620 |
| 6 | 895 |
| 7 | 1220 |
| 8 | 1595 |
| 9 | 2020 |
| 10 | 2495 |
| 11 | 3020 |
| 12 | 3595 |
| 13 | 4220 |
| 14 | 4895 |
| 15 | 5620 |
| 16 | 6395 |
| 17 | 7220 |
| 18 | 8095 |
| 19 | 9020 |
| 20 | 9995 |
| 21 | 11020 |
| 22 | 12095 |
| 23 | 13220 |
| 24 | 14395 |
| 25 | 15620 |
| 26 | 16895 |
| 27 | 18220 |
| 28 | 19595 |
| 29 | 21020 |
| 30 | 22495 |
| 31 | 24020 |
| 32 | 25595 |
| 33 | 27220 |
| 34 | 28895 |
| 35 | 30620 |
| 36 | 32395 |
| 37 | 34220 |
| 38 | 36095 |
| 39 | 38020 |
| 40 | 39995 |
| 41 | 42020 |
| 42 | 44095 |