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) |
|---|---|
| 5 | 41 |
| 6 | 148 |
| 7 | 409 |
| 8 | 998 |
| 9 | 2597 |
| 10 | 6424 |
| 11 | 15889 |
| 12 | 39970 |
| 13 | 100192 |
| 14 | 251637 |
| 15 | 637063 |
| 16 | 1617110 |
| 17 | 4124272 |
| 18 | 10553278 |
| 19 | 27066824 |
| 20 | 69709557 |
| 21 | 179992524 |
| 22 | 465769748 |
| 23 | 1208198402 |
| 24 | 3140421406 |
| 25 | 8179001739 |
| 26 | 21338685037 |
| 27 | 55762148901 |
| 28 | 145935688930 |
| 29 | 382465573384 |
| 30 | 1003652346785 |
| 31 | 2636913002779 |