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 | 2 |
| 2 | 10 |
| 3 | 30 |
| 4 | 68 |
| 5 | 140 |
| 6 | 246 |
| 7 | 406 |
| 8 | 616 |
| 9 | 900 |
| 10 | 1290 |
| 11 | 1760 |
| 12 | 2364 |
| 13 | 3094 |
| 14 | 3934 |
| 15 | 4920 |
| 16 | 6096 |
| 17 | 7480 |
| 18 | 9018 |
| 19 | 10792 |
| 20 | 12780 |
| 21 | 14952 |
| 22 | 17402 |
| 23 | 20102 |
| 24 | 23112 |
| 25 | 26500 |
| 26 | 30186 |
| 27 | 34128 |
| 28 | 38388 |
| 29 | 42920 |
| 30 | 47790 |
| 31 | 53320 |
| 32 | 59232 |
| 33 | 65604 |
| 34 | 72318 |
| 35 | 79660 |
| 36 | 87372 |
| 37 | 95608 |
| 38 | 104386 |
| 39 | 113646 |
| 40 | 123480 |