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) |
|---|---|
| 1 | 26 |
| 2 | 126 |
| 3 | 422 |
| 4 | 1302 |
| 5 | 3926 |
| 6 | 11766 |
| 7 | 35222 |
| 8 | 105462 |
| 9 | 315926 |
| 10 | 946806 |
| 11 | 2838422 |
| 12 | 8511222 |
| 13 | 25525526 |
| 14 | 76560246 |
| 15 | 229648022 |
| 16 | 688878582 |
| 17 | 2066504726 |
| 18 | 6199252086 |
| 19 | 18597232022 |
| 20 | 55790647542 |
| 21 | 167369845526 |
| 22 | 502105342326 |
| 23 | 1506307638422 |
| 24 | 4518906138102 |
| 25 | 13556684859926 |
| 26 | 40669987470966 |