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 | 6 |
| 1 | 19 |
| 2 | 58 |
| 3 | 175 |
| 4 | 526 |
| 5 | 1579 |
| 6 | 4738 |
| 7 | 14215 |
| 8 | 42646 |
| 9 | 127939 |
| 10 | 383818 |
| 11 | 1151455 |
| 12 | 3454366 |
| 13 | 10363099 |
| 14 | 31089298 |
| 15 | 93267895 |
| 16 | 279803686 |
| 17 | 839411059 |
| 18 | 2518233178 |
| 19 | 7554699535 |
| 20 | 22664098606 |
| 21 | 67992295819 |
| 22 | 203976887458 |
| 23 | 611930662375 |
| 24 | 1835791987126 |
| 25 | 5507375961379 |
| 26 | 16522127884138 |