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 | 24 |
| 2 | 74 |
| 3 | 228 |
| 4 | 698 |
| 5 | 2124 |
| 6 | 6434 |
| 7 | 19428 |
| 8 | 58538 |
| 9 | 176124 |
| 10 | 529394 |
| 11 | 1590228 |
| 12 | 4774778 |
| 13 | 14332524 |
| 14 | 43013954 |
| 15 | 129074628 |
| 16 | 387289418 |
| 17 | 1161999324 |
| 18 | 3486260114 |
| 19 | 10459304628 |
| 20 | 31378962458 |
| 21 | 94138984524 |
| 22 | 282421147874 |
| 23 | 847271832228 |
| 24 | 2541832273898 |
| 25 | 7625530376124 |
| 26 | 22876658237234 |