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 | 2 |
| 1 | 18 |
| 2 | 80 |
| 3 | 255 |
| 4 | 666 |
| 5 | 1520 |
| 6 | 3144 |
| 7 | 6030 |
| 8 | 10890 |
| 9 | 18722 |
| 10 | 30888 |
| 11 | 49205 |
| 12 | 76050 |
| 13 | 114480 |
| 14 | 168368 |
| 15 | 242556 |
| 16 | 343026 |
| 17 | 477090 |
| 18 | 653600 |
| 19 | 883179 |
| 20 | 1178474 |
| 21 | 1554432 |
| 22 | 2028600 |
| 23 | 2621450 |
| 24 | 3356730 |
| 25 | 4261842 |
| 26 | 5368248 |