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 | 1 |
| 1 | 1 |
| 2 | 1 |
| 3 | 1 |
| 4 | 3 |
| 5 | 11 |
| 6 | 31 |
| 7 | 71 |
| 8 | 211 |
| 9 | 883 |
| 10 | 3571 |
| 11 | 12211 |
| 12 | 35641 |
| 13 | 91521 |
| 14 | 212213 |
| 15 | 453181 |
| 16 | 904541 |
| 17 | 1706461 |
| 18 | 3069181 |
| 19 | 5298493 |
| 20 | 8827591 |
| 21 | 14256271 |
| 22 | 22398531 |
| 23 | 34339691 |
| 24 | 51504223 |
| 25 | 75735551 |
| 26 | 109389151 |
| 27 | 155440351 |
| 28 | 217608301 |
| 29 | 300497653 |
| 30 | 409759561 |
| 31 | 552273681 |
| 32 | 736352921 |
| 33 | 971972761 |