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 | 20 |
| 3 | 63 |
| 4 | 141 |
| 5 | 284 |
| 6 | 478 |
| 7 | 780 |
| 8 | 1156 |
| 9 | 1667 |
| 10 | 2298 |
| 11 | 3111 |
| 12 | 4012 |
| 13 | 5213 |
| 14 | 6520 |
| 15 | 8063 |
| 16 | 9839 |
| 17 | 11943 |
| 18 | 14184 |
| 19 | 16882 |
| 20 | 19667 |
| 21 | 22953 |
| 22 | 26467 |
| 23 | 30431 |
| 24 | 34509 |
| 25 | 39359 |
| 26 | 44396 |
| 27 | 49878 |
| 28 | 55801 |
| 29 | 62298 |
| 30 | 68881 |
| 31 | 76518 |
| 32 | 84233 |
| 33 | 92751 |
| 34 | 101639 |
| 35 | 111167 |
| 36 | 121017 |
| 37 | 132078 |
| 38 | 143185 |
| 39 | 155102 |