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 | 4 |
| 3 | 12 |
| 4 | 20 |
| 5 | 30 |
| 6 | 54 |
| 7 | 91 |
| 8 | 120 |
| 9 | 171 |
| 10 | 250 |
| 11 | 374 |
| 12 | 504 |
| 13 | 663 |
| 14 | 854 |
| 15 | 1170 |
| 16 | 1568 |
| 17 | 2074 |
| 18 | 2628 |
| 19 | 3325 |
| 20 | 4180 |
| 21 | 5313 |
| 22 | 6754 |
| 23 | 8602 |
| 24 | 10656 |
| 25 | 13100 |
| 26 | 16042 |
| 27 | 19683 |
| 28 | 24024 |
| 29 | 29464 |
| 30 | 36000 |
| 31 | 43834 |
| 32 | 52768 |
| 33 | 63228 |
| 34 | 75582 |
| 35 | 90510 |
| 36 | 107856 |
| 37 | 128575 |
| 38 | 153178 |
| 39 | 182208 |
| 40 | 215400 |