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 | 19 |
| 2 | 181 |
| 3 | 1159 |
| 4 | 5641 |
| 5 | 22363 |
| 6 | 75517 |
| 7 | 224143 |
| 8 | 598417 |
| 9 | 1462563 |
| 10 | 3317445 |
| 11 | 7059735 |
| 12 | 14218905 |
| 13 | 27298155 |
| 14 | 50250765 |
| 15 | 89129247 |
| 16 | 152951073 |
| 17 | 254831667 |
| 18 | 413442773 |
| 19 | 654862247 |
| 20 | 1014889769 |
| 21 | 1541911931 |
| 22 | 2300409629 |
| 23 | 3375210671 |
| 24 | 4876601009 |
| 25 | 6946419011 |
| 26 | 9765268709 |