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 | 0 |
| 1 | 1 |
| 2 | 22 |
| 3 | 243 |
| 4 | 1804 |
| 5 | 10165 |
| 6 | 46530 |
| 7 | 180775 |
| 8 | 614680 |
| 9 | 1871145 |
| 10 | 5188590 |
| 11 | 13286043 |
| 12 | 31760676 |
| 13 | 71513949 |
| 14 | 152784282 |
| 15 | 311603535 |
| 16 | 609802800 |
| 17 | 1150082385 |
| 18 | 2098144710 |
| 19 | 3714481475 |
| 20 | 6399123260 |
| 21 | 10753517061 |
| 22 | 17664712562 |
| 23 | 28418229623 |
| 24 | 44847366984 |
| 25 | 69528316025 |
| 26 | 106032285086 |