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 | 182 |
| 2 | 8372 |
| 3 | 176722 |
| 4 | 2206932 |
| 5 | 18827718 |
| 6 | 120353324 |
| 7 | 614266354 |
| 8 | 2619716554 |
| 9 | 9654482474 |
| 10 | 31534801116 |
| 11 | 93093230958 |
| 12 | 252208679268 |
| 13 | 634756203018 |
| 14 | 1498750896708 |
| 15 | 3346707628446 |
| 16 | 7114703302434 |
| 17 | 14479567043214 |
| 18 | 28342922553764 |
| 19 | 53573492643034 |
| 20 | 98118326104708 |