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 | 13 |
| 2 | 169 |
| 3 | 336 |
| 4 | 964 |
| 5 | 2310 |
| 6 | 4728 |
| 7 | 9450 |
| 8 | 18940 |
| 9 | 37656 |
| 10 | 70916 |
| 11 | 136496 |
| 12 | 259444 |
| 13 | 485812 |
| 14 | 917072 |
| 15 | 1704676 |
| 16 | 3183548 |
| 17 | 5913532 |
| 18 | 10932836 |
| 19 | 20269368 |
| 20 | 37337548 |
| 21 | 68861592 |
| 22 | 126762078 |
| 23 | 232800870 |
| 24 | 427869304 |
| 25 | 784395562 |
| 26 | 1438074950 |
| 27 | 2634363880 |