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 | 6 |
| 3 | 10 |
| 4 | -28 |
| 5 | 264 |
| 6 | 234 |
| 7 | 1054 |
| 8 | 950 |
| 9 | 2530 |
| 10 | 8700 |
| 11 | 9300 |
| 12 | 20054 |
| 13 | 27552 |
| 14 | 28208 |
| 15 | 36754 |
| 16 | 63070 |
| 17 | 94518 |
| 18 | 96258 |
| 19 | 137484 |
| 20 | 163300 |
| 21 | 163958 |
| 22 | 219620 |
| 23 | 256138 |
| 24 | 330190 |
| 25 | 462884 |
| 26 | 520150 |
| 27 | 524270 |
| 28 | 582294 |
| 29 | 588600 |
| 30 | 652236 |
| 31 | 1086612 |
| 32 | 1179000 |
| 33 | 1374384 |
| 34 | 1387220 |
| 35 | 1828230 |
| 36 | 1838274 |
| 37 | 2092496 |
| 38 | 2366760 |
| 39 | 2529382 |
| 40 | 2842390 |