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 | 3 |
| 2 | 12 |
| 3 | 22 |
| 4 | 79 |
| 5 | 194 |
| 6 | 537 |
| 7 | 1519 |
| 8 | 4011 |
| 9 | 11258 |
| 10 | 30506 |
| 11 | 83661 |
| 12 | 229754 |
| 13 | 627171 |
| 14 | 1721547 |
| 15 | 4710045 |
| 16 | 12901630 |
| 17 | 35342272 |
| 18 | 96764537 |
| 19 | 265067580 |
| 20 | 725878627 |
| 21 | 1988023833 |
| 22 | 5444771405 |
| 23 | 14911382924 |
| 24 | 40839083772 |
| 25 | 111846316151 |
| 26 | 306317816028 |
| 27 | 838924085421 |
| 28 | 2297583803229 |
| 29 | 6292480053823 |