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 | 26 |
| 2 | 100 |
| 3 | 272 |
| 4 | 640 |
| 5 | 1400 |
| 6 | 2944 |
| 7 | 6056 |
| 8 | 12304 |
| 9 | 24824 |
| 10 | 49888 |
| 11 | 100040 |
| 12 | 200368 |
| 13 | 401048 |
| 14 | 802432 |
| 15 | 1605224 |
| 16 | 3210832 |
| 17 | 6422072 |
| 18 | 12844576 |
| 19 | 25689608 |
| 20 | 51379696 |
| 21 | 102759896 |
| 22 | 205520320 |
| 23 | 411041192 |
| 24 | 822082960 |
| 25 | 1644166520 |
| 26 | 3288333664 |
| 27 | 6576667976 |
| 28 | 13153336624 |
| 29 | 26306673944 |