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) |
|---|---|
| 2 | 3 |
| 3 | 15 |
| 4 | 53 |
| 5 | 127 |
| 6 | 285 |
| 7 | 511 |
| 8 | 901 |
| 9 | 1447 |
| 10 | 2249 |
| 11 | 3231 |
| 12 | 4637 |
| 13 | 6367 |
| 14 | 8713 |
| 15 | 11439 |
| 16 | 14801 |
| 17 | 18739 |
| 18 | 23733 |
| 19 | 29339 |
| 20 | 36269 |
| 21 | 44131 |
| 22 | 53305 |
| 23 | 63347 |
| 24 | 75329 |
| 25 | 88587 |
| 26 | 103973 |
| 27 | 120607 |
| 28 | 139505 |
| 29 | 160151 |
| 30 | 183925 |
| 31 | 209387 |
| 32 | 238433 |
| 33 | 269939 |
| 34 | 304789 |
| 35 | 341759 |
| 36 | 382601 |
| 37 | 426227 |
| 38 | 474965 |
| 39 | 526379 |
| 40 | 582389 |