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 | 4 |
| 1 | 2 |
| 2 | -2 |
| 3 | 12 |
| 4 | 12 |
| 5 | 10 |
| 6 | 54 |
| 7 | 68 |
| 8 | 108 |
| 9 | 282 |
| 10 | 422 |
| 11 | 772 |
| 12 | 1604 |
| 13 | 2674 |
| 14 | 5006 |
| 15 | 9580 |
| 16 | 16884 |
| 17 | 31506 |
| 18 | 58606 |
| 19 | 105948 |
| 20 | 196508 |
| 21 | 362298 |
| 22 | 662022 |
| 23 | 1222772 |
| 24 | 2249116 |
| 25 | 4127210 |
| 26 | 7605718 |
| 27 | 13984148 |
| 28 | 25701652 |
| 29 | 47311458 |
| 30 | 86994846 |
| 31 | 159975004 |
| 32 | 294336612 |
| 33 | 541281698 |
| 34 | 995529822 |
| 35 | 1831291692 |
| 36 | 3367998380 |
| 37 | 6194717674 |