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 | 0 |
| 1 | 29 |
| 2 | 69 |
| 3 | 153 |
| 4 | 373 |
| 5 | 917 |
| 6 | 2321 |
| 7 | 5933 |
| 8 | 15317 |
| 9 | 39737 |
| 10 | 103461 |
| 11 | 269925 |
| 12 | 705169 |
| 13 | 1843709 |
| 14 | 4822949 |
| 15 | 12620249 |
| 16 | 33029909 |
| 17 | 86456693 |
| 18 | 226319505 |
| 19 | 592468365 |
| 20 | 1551031477 |
| 21 | 4060538489 |
| 22 | 10630442309 |
| 23 | 27830559173 |
| 24 | 72860864273 |
| 25 | 190751433437 |
| 26 | 499392464901 |
| 27 | 1307424389913 |