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 | 128 |
| 2 | 3517 |
| 3 | 32032 |
| 4 | 195927 |
| 5 | 810964 |
| 6 | 2810751 |
| 7 | 7989940 |
| 8 | 20567199 |
| 9 | 46931176 |
| 10 | 100480363 |
| 11 | 198506588 |
| 12 | 375153177 |
| 13 | 669200436 |
| 14 | 1155420975 |
| 15 | 1910171088 |
| 16 | 3080038929 |
| 17 | 4801129076 |
| 18 | 7337318733 |
| 19 | 10913397192 |
| 20 | 15974820909 |
| 21 | 22870564032 |