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) |
|---|---|
| 0 | 1 |
| 1 | 15 |
| 2 | 53 |
| 3 | 115 |
| 4 | 201 |
| 5 | 311 |
| 6 | 445 |
| 7 | 603 |
| 8 | 785 |
| 9 | 991 |
| 10 | 1221 |
| 11 | 1475 |
| 12 | 1753 |
| 13 | 2055 |
| 14 | 2381 |
| 15 | 2731 |
| 16 | 3105 |
| 17 | 3503 |
| 18 | 3925 |
| 19 | 4371 |
| 20 | 4841 |
| 21 | 5335 |
| 22 | 5853 |
| 23 | 6395 |
| 24 | 6961 |
| 25 | 7551 |
| 26 | 8165 |
| 27 | 8803 |
| 28 | 9465 |
| 29 | 10151 |
| 30 | 10861 |
| 31 | 11595 |
| 32 | 12353 |
| 33 | 13135 |
| 34 | 13941 |
| 35 | 14771 |
| 36 | 15625 |
| 37 | 16503 |
| 38 | 17405 |
| 39 | 18331 |
| 40 | 19281 |