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 | 3 |
| 2 | 7 |
| 3 | 16 |
| 4 | 36 |
| 5 | 78 |
| 6 | 144 |
| 7 | 222 |
| 8 | 324 |
| 9 | 438 |
| 10 | 668 |
| 11 | 900 |
| 12 | 1148 |
| 13 | 1518 |
| 14 | 1764 |
| 15 | 2022 |
| 16 | 2492 |
| 17 | 3128 |
| 18 | 3600 |
| 19 | 4088 |
| 20 | 4758 |
| 21 | 5184 |
| 22 | 5768 |
| 23 | 6558 |
| 24 | 7388 |
| 25 | 8634 |
| 26 | 9798 |
| 27 | 10404 |
| 28 | 11022 |
| 29 | 11664 |
| 30 | 12318 |
| 31 | 14352 |
| 32 | 16638 |
| 33 | 17948 |
| 34 | 19044 |
| 35 | 20712 |
| 36 | 22500 |
| 37 | 23708 |
| 38 | 25592 |
| 39 | 27222 |
| 40 | 28892 |