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 | 50 |
| 2 | 163 |
| 3 | 421 |
| 4 | 1005 |
| 5 | 2317 |
| 6 | 5245 |
| 7 | 11741 |
| 8 | 26077 |
| 9 | 57565 |
| 10 | 126429 |
| 11 | 276445 |
| 12 | 602077 |
| 13 | 1306589 |
| 14 | 2826205 |
| 15 | 6094813 |
| 16 | 13107165 |
| 17 | 28114909 |
| 18 | 60162013 |
| 19 | 128450525 |
| 20 | 273678301 |
| 21 | 581959645 |
| 22 | 1235222493 |
| 23 | 2617245661 |
| 24 | 5536481245 |
| 25 | 11693719517 |