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) |
|---|---|
| 26 | 1 |
| 27 | 27 |
| 28 | 378 |
| 29 | 3654 |
| 30 | 27405 |
| 31 | 169911 |
| 32 | 906192 |
| 33 | 4272048 |
| 34 | 18156204 |
| 35 | 70607460 |
| 36 | 254186856 |
| 37 | 854992152 |
| 38 | 2707475148 |
| 39 | 8122425444 |
| 40 | 23206929840 |
| 41 | 63432274896 |
| 42 | 166509721602 |
| 43 | 421171648758 |
| 44 | 1029530696964 |
| 45 | 2438362177020 |
| 46 | 5608233007146 |
| 47 | 12551759587422 |
| 48 | 27385657281648 |