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 | 3 |
| 5 | 23 |
| 6 | 92 |
| 7 | 386 |
| 8 | 1004 |
| 9 | 3128 |
| 10 | 8039 |
| 11 | 24725 |
| 12 | 56825 |
| 13 | 159665 |
| 14 | 383447 |
| 15 | 1113059 |
| 16 | 2366723 |
| 17 | 6191435 |
| 18 | 14145653 |
| 19 | 39253721 |
| 20 | 84455981 |
| 21 | 223305485 |
| 22 | 513899477 |
| 23 | 1435302869 |
| 24 | 2999680197 |
| 25 | 7717870961 |
| 26 | 17422727232 |
| 27 | 47809866678 |
| 28 | 102098766668 |
| 29 | 268024219452 |
| 30 | 613622726480 |
| 31 | 1705588304448 |