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 | 290 |
| 1 | 835 |
| 2 | 1610 |
| 3 | 4195 |
| 4 | 17060 |
| 5 | 23845 |
| 6 | 46490 |
| 7 | 89080 |
| 8 | 138125 |
| 9 | 255775 |
| 10 | 506510 |
| 11 | 1238395 |
| 12 | 5127260 |
| 13 | 8616205 |
| 14 | 15984335 |
| 15 | 31949470 |
| 16 | 79793675 |
| 17 | 315404860 |
| 18 | 569392925 |
| 19 | 1060061935 |
| 20 | 2114961710 |
| 21 | 5206421995 |
| 22 | 20997654620 |
| 23 | 35262166285 |