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 | 9 |
| 3 | 30 |
| 4 | 70 |
| 5 | 165 |
| 6 | 273 |
| 7 | 476 |
| 8 | 684 |
| 9 | 1035 |
| 10 | 1595 |
| 11 | 2046 |
| 12 | 2886 |
| 13 | 3731 |
| 14 | 4515 |
| 15 | 5640 |
| 16 | 7208 |
| 17 | 9027 |
| 18 | 10431 |
| 19 | 12730 |
| 20 | 14910 |
| 21 | 16863 |
| 22 | 19987 |
| 23 | 22908 |
| 24 | 26700 |
| 25 | 31525 |
| 26 | 35451 |
| 27 | 38934 |
| 28 | 43442 |
| 29 | 47415 |
| 30 | 52545 |
| 31 | 62992 |
| 32 | 69168 |
| 33 | 76857 |
| 34 | 82705 |
| 35 | 93870 |
| 36 | 100566 |
| 37 | 110371 |
| 38 | 120783 |
| 39 | 130260 |
| 40 | 141860 |