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) |
|---|---|
| 4 | 10 |
| 5 | 30 |
| 6 | 95 |
| 7 | 311 |
| 8 | 1043 |
| 9 | 3564 |
| 10 | 12363 |
| 11 | 43420 |
| 12 | 154088 |
| 13 | 551684 |
| 14 | 1990326 |
| 15 | 7228417 |
| 16 | 26405725 |
| 17 | 96961560 |
| 18 | 357688755 |
| 19 | 1324982160 |
| 20 | 4926502020 |
| 21 | 18379785300 |
| 22 | 68783559810 |
| 23 | 258141170430 |
| 24 | 971310800694 |
| 25 | 3663524817768 |
| 26 | 13848466284350 |