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 | 0 |
| 2 | 152 |
| 3 | 203 |
| 4 | 579 |
| 5 | 1403 |
| 6 | 1692 |
| 7 | 3860 |
| 8 | 8652 |
| 9 | 10335 |
| 10 | 22967 |
| 11 | 50895 |
| 12 | 60704 |
| 13 | 134328 |
| 14 | 297104 |
| 15 | 354275 |
| 16 | 783387 |
| 17 | 1732115 |
| 18 | 2065332 |
| 19 | 4566380 |
| 20 | 10095972 |
| 21 | 12038103 |
| 22 | 26615279 |
| 23 | 58844103 |
| 24 | 70163672 |
| 25 | 155125680 |
| 26 | 342969032 |
| 27 | 408944315 |
| 28 | 904139187 |
| 29 | 1998970475 |
| 30 | 2383502604 |
| 31 | 5269709828 |