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 | 834 |
| 2 | 3966 |
| 3 | 18384 |
| 4 | 82968 |
| 5 | 381222 |
| 6 | 1744494 |
| 7 | 7972932 |
| 8 | 36489120 |
| 9 | 166920402 |
| 10 | 763564758 |
| 11 | 3493201536 |
| 12 | 15980209872 |
| 13 | 73104350502 |
| 14 | 334430964150 |
| 15 | 1529917916484 |
| 16 | 6998905422984 |
| 17 | 32017855579074 |
| 18 | 146471872453902 |
| 19 | 670063969035792 |