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 | 1 |
| 2 | 3 |
| 3 | 4 |
| 4 | 19 |
| 5 | 6 |
| 6 | 222 |
| 7 | 8 |
| 8 | 531 |
| 9 | 85 |
| 10 | 1008 |
| 11 | 12 |
| 12 | 249070 |
| 13 | 14 |
| 14 | 2754 |
| 15 | 3384 |
| 16 | 66067 |
| 17 | 18 |
| 18 | 1889871 |
| 19 | 20 |
| 20 | 3201024 |
| 21 | 9272 |
| 22 | 10662 |
| 23 | 24 |
| 24 | 4586721006 |
| 25 | 631 |
| 26 | 17592 |
| 27 | 19768 |
| 28 | 17213138 |
| 29 | 30 |
| 30 | 21870004602 |
| 31 | 32 |
| 32 | 33620499 |
| 33 | 35952 |
| 34 | 39324 |
| 35 | 42888 |
| 36 | 2821112046175 |
| 37 | 38 |
| 38 | 54894 |
| 39 | 59336 |
| 40 | 163843201536 |