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 | 2315 |
| 2 | 80312 |
| 3 | 901668 |
| 4 | 20310714 |
| 5 | 82235688 |
| 6 | 473087190 |
| 7 | 1304210412 |
| 8 | 4298697186 |
| 9 | 20654701756 |
| 10 | 44762490420 |
| 11 | 122444491244 |
| 12 | 289686151014 |
| 13 | 466572884988 |
| 14 | 778441731570 |
| 15 | 1681334260300 |
| 16 | 3663362624656 |
| 17 | 5631394320840 |
| 18 | 9203454441344 |
| 19 | 15155831763714 |
| 20 | 20142518677488 |