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 | 3 |
| 2 | 133 |
| 3 | 931 |
| 4 | 3441 |
| 5 | 9211 |
| 6 | 20293 |
| 7 | 39243 |
| 8 | 69121 |
| 9 | 113491 |
| 10 | 176421 |
| 11 | 262483 |
| 12 | 376753 |
| 13 | 524811 |
| 14 | 712741 |
| 15 | 947131 |
| 16 | 1235073 |
| 17 | 1584163 |
| 18 | 2002501 |
| 19 | 2498691 |
| 20 | 3081841 |
| 21 | 3761563 |
| 22 | 4547973 |
| 23 | 5451691 |
| 24 | 6483841 |
| 25 | 7656051 |
| 26 | 8980453 |
| 27 | 10469683 |
| 28 | 12136881 |
| 29 | 13995691 |
| 30 | 16060261 |
| 31 | 18345243 |