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 | 64 |
| 2 | 244 |
| 3 | 1371 |
| 4 | 5892 |
| 5 | 19770 |
| 6 | 54992 |
| 7 | 132810 |
| 8 | 287700 |
| 9 | 572042 |
| 10 | 1061520 |
| 11 | 1861242 |
| 12 | 3112580 |
| 13 | 5000730 |
| 14 | 7762992 |
| 15 | 11697770 |
| 16 | 17174292 |
| 17 | 24643050 |
| 18 | 34646960 |
| 19 | 47833242 |
| 20 | 64966020 |
| 21 | 86939642 |
| 22 | 114792720 |
| 23 | 149722890 |
| 24 | 193102292 |
| 25 | 246493770 |
| 26 | 311667792 |
| 27 | 390620090 |
| 28 | 485590020 |