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) |
|---|---|
| 0 | 1 |
| 1 | 57 |
| 2 | 225 |
| 3 | 505 |
| 4 | 897 |
| 5 | 1401 |
| 6 | 2017 |
| 7 | 2745 |
| 8 | 3585 |
| 9 | 4537 |
| 10 | 5601 |
| 11 | 6777 |
| 12 | 8065 |
| 13 | 9465 |
| 14 | 10977 |
| 15 | 12601 |
| 16 | 14337 |
| 17 | 16185 |
| 18 | 18145 |
| 19 | 20217 |
| 20 | 22401 |
| 21 | 24697 |
| 22 | 27105 |
| 23 | 29625 |
| 24 | 32257 |
| 25 | 35001 |
| 26 | 37857 |
| 27 | 40825 |
| 28 | 43905 |
| 29 | 47097 |
| 30 | 50401 |
| 31 | 53817 |
| 32 | 57345 |
| 33 | 60985 |
| 34 | 64737 |
| 35 | 68601 |
| 36 | 72577 |
| 37 | 76665 |
| 38 | 80865 |
| 39 | 85177 |
| 40 | 89601 |