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 | 1 |
| 2 | 5 |
| 3 | 16 |
| 4 | 48 |
| 5 | 145 |
| 6 | 436 |
| 7 | 1309 |
| 8 | 3929 |
| 9 | 11789 |
| 10 | 35367 |
| 11 | 106103 |
| 12 | 318310 |
| 13 | 954932 |
| 14 | 2864798 |
| 15 | 8594395 |
| 16 | 25783185 |
| 17 | 77349555 |
| 18 | 232048666 |
| 19 | 696145998 |
| 20 | 2088437995 |
| 21 | 6265313986 |
| 22 | 18795941958 |
| 23 | 56387825876 |
| 24 | 169163477629 |
| 25 | 507490432888 |
| 26 | 1522471298664 |