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 | 4 |
| 2 | 2 |
| 3 | 4 |
| 4 | 11 |
| 5 | 24 |
| 6 | 42 |
| 7 | 79 |
| 8 | 156 |
| 9 | 304 |
| 10 | 587 |
| 11 | 1144 |
| 12 | 2246 |
| 13 | 4419 |
| 14 | 8712 |
| 15 | 17224 |
| 16 | 34131 |
| 17 | 67744 |
| 18 | 134642 |
| 19 | 267919 |
| 20 | 533636 |
| 21 | 1063704 |
| 22 | 2121627 |
| 23 | 4233904 |
| 24 | 8452686 |
| 25 | 16880899 |
| 26 | 33722192 |
| 27 | 67380304 |
| 28 | 134656931 |
| 29 | 269146104 |
| 30 | 538020762 |
| 31 | 1075602319 |
| 32 | 2150493996 |
| 33 | 4299838144 |
| 34 | 8597815787 |