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 | 0 |
| 1 | 1 |
| 2 | 10 |
| 3 | 21 |
| 4 | 52 |
| 5 | 73 |
| 6 | 1001 |
| 7 | 1074 |
| 8 | 8519 |
| 9 | 154416 |
| 10 | 317351 |
| 11 | 789118 |
| 12 | 1106469 |
| 13 | 3002056 |
| 14 | 10112637 |
| 15 | 43452604 |
| 16 | 53565241 |
| 17 | 97017845 |
| 18 | 1411815071 |
| 19 | 2920647987 |
| 20 | 129920326499 |
| 21 | 132840974486 |
| 22 | 528443249957 |
| 23 | 661284224443 |
| 24 | 9786422392159 |
| 25 | 20234129008761 |
| 26 | 50254680409681 |
| 27 | 70488809418442 |
| 28 | 120743489828123 |
| 29 | 311975789074688 |