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) |
|---|---|
| 4 | 1 |
| 5 | 11 |
| 6 | 79 |
| 7 | 472 |
| 8 | 2554 |
| 9 | 13024 |
| 10 | 63958 |
| 11 | 306382 |
| 12 | 1443463 |
| 13 | 6725059 |
| 14 | 31101315 |
| 15 | 143160979 |
| 16 | 657181579 |
| 17 | 3012930550 |
| 18 | 13810302898 |
| 19 | 63339713546 |
| 20 | 290848317898 |
| 21 | 1337717758649 |
| 22 | 6164619409085 |
| 23 | 28469921477415 |
| 24 | 131784947615381 |
| 25 | 611477036684719 |