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 | 2 |
| 2 | 3 |
| 3 | 5 |
| 4 | 10 |
| 5 | 26 |
| 6 | 87 |
| 7 | 359 |
| 8 | 1744 |
| 9 | 9680 |
| 10 | 60201 |
| 11 | 413993 |
| 12 | 3116758 |
| 13 | 25485014 |
| 14 | 224845995 |
| 15 | 2128603307 |
| 16 | 21520115452 |
| 17 | 231385458428 |
| 18 | 2636265133869 |
| 19 | 31725150246701 |
| 20 | 402096338484226 |
| 21 | 5353594391608322 |
| 22 | 74702468784746223 |
| 23 | 1090126355291598575 |
| 24 | 16604660518848685480 |