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 | 1 |
| 2 | 4 |
| 3 | 10 |
| 4 | 22 |
| 5 | 46 |
| 6 | 94 |
| 7 | 118 |
| 8 | 166 |
| 9 | 334 |
| 10 | 358 |
| 11 | 718 |
| 12 | 1438 |
| 13 | 2878 |
| 14 | 5758 |
| 15 | 8158 |
| 16 | 8254 |
| 17 | 9838 |
| 18 | 19678 |
| 19 | 22558 |
| 20 | 43198 |
| 21 | 56638 |
| 22 | 103198 |
| 23 | 169438 |
| 24 | 184798 |
| 25 | 190558 |
| 26 | 193918 |
| 27 | 274558 |
| 28 | 315358 |
| 29 | 318238 |
| 30 | 357598 |
| 31 | 419038 |
| 32 | 439678 |
| 33 | 486238 |
| 34 | 698398 |
| 35 | 858238 |
| 36 | 1716478 |
| 37 | 1723198 |
| 38 | 1965118 |
| 39 | 2029438 |
| 40 | 4058878 |