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) |
|---|---|
| 1 | 3 |
| 2 | 49 |
| 3 | 83 |
| 4 | 369 |
| 5 | 957 |
| 6 | 3217 |
| 7 | 9295 |
| 8 | 28977 |
| 9 | 86267 |
| 10 | 262541 |
| 11 | 787121 |
| 12 | 2374869 |
| 13 | 7129517 |
| 14 | 21441049 |
| 15 | 64366847 |
| 16 | 193314809 |
| 17 | 580205169 |
| 18 | 1741524549 |
| 19 | 5225949099 |
| 20 | 15681813101 |
| 21 | 47052271005 |
| 22 | 141174409049 |
| 23 | 423556062389 |
| 24 | 1270747118001 |
| 25 | 3812396126529 |