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 | 10 |
| 2 | 119 |
| 3 | 1328 |
| 4 | 14637 |
| 5 | 161046 |
| 6 | 1771555 |
| 7 | 19487164 |
| 8 | 214358873 |
| 9 | 2357947682 |
| 10 | 25937424591 |
| 11 | 285311670600 |
| 12 | 3138428376709 |
| 13 | 34522712143918 |
| 14 | 379749833583227 |
| 15 | 4177248169415636 |
| 16 | 45949729863572145 |
| 17 | 505447028499293754 |
| 18 | 5559917313492231463 |
| 19 | 61159090448414546272 |
| 20 | 672749994932560009181 |