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 | 1 |
| 2 | 3 |
| 3 | 7 |
| 4 | 45 |
| 5 | 66 |
| 6 | 186 |
| 7 | 267 |
| 8 | 657 |
| 9 | 721 |
| 10 | 1501 |
| 11 | 1893 |
| 12 | 2772 |
| 13 | 3654 |
| 14 | 5727 |
| 15 | 6511 |
| 16 | 9969 |
| 17 | 11340 |
| 18 | 14850 |
| 19 | 18051 |
| 20 | 23921 |
| 21 | 26755 |
| 22 | 35201 |
| 23 | 39975 |
| 24 | 47280 |
| 25 | 55776 |
| 26 | 69863 |
| 27 | 75385 |
| 28 | 93017 |
| 29 | 102864 |
| 30 | 117810 |
| 31 | 134541 |
| 32 | 161217 |
| 33 | 172921 |
| 34 | 205293 |
| 35 | 221271 |
| 36 | 252828 |
| 37 | 277242 |
| 38 | 322811 |
| 39 | 341017 |
| 40 | 393721 |
| 41 | 420702 |
| 42 | 466074 |
| 43 | 509379 |