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 | 8 |
| 3 | 24 |
| 4 | 75 |
| 5 | 233 |
| 6 | 714 |
| 7 | 2166 |
| 8 | 6533 |
| 9 | 19647 |
| 10 | 59004 |
| 11 | 177092 |
| 12 | 531375 |
| 13 | 1594245 |
| 14 | 4782878 |
| 15 | 14348802 |
| 16 | 43046601 |
| 17 | 129140027 |
| 18 | 387420336 |
| 19 | 1162261296 |
| 20 | 3486784211 |
| 21 | 10460352993 |
| 22 | 31381059378 |
| 23 | 94143178574 |
| 24 | 282429536205 |
| 25 | 847288609143 |
| 26 | 2541865828004 |
| 27 | 7625597484636 |
| 28 | 22876792454583 |
| 29 | 68630377364477 |
| 30 | 205891132094214 |
| 31 | 617673396283482 |
| 32 | 1853020188851345 |
| 33 | 5559060566554995 |