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 | 257 |
| 2 | 1025 |
| 3 | 3329 |
| 4 | 10241 |
| 5 | 30977 |
| 6 | 93185 |
| 7 | 279809 |
| 8 | 839681 |
| 9 | 2519297 |
| 10 | 7558145 |
| 11 | 22674689 |
| 12 | 68024321 |
| 13 | 204073217 |
| 14 | 612219905 |
| 15 | 1836659969 |
| 16 | 5509980161 |
| 17 | 16529940737 |
| 18 | 49589822465 |
| 19 | 148769467649 |
| 20 | 446308403201 |
| 21 | 1338925209857 |
| 22 | 4016775629825 |
| 23 | 12050326889729 |
| 24 | 36150980669441 |