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) |
|---|---|
| 0 | 6 |
| 1 | 34 |
| 2 | 199 |
| 3 | 1159 |
| 4 | 6756 |
| 5 | 39376 |
| 6 | 229501 |
| 7 | 1337629 |
| 8 | 7796274 |
| 9 | 45440014 |
| 10 | 264843811 |
| 11 | 1543622851 |
| 12 | 8996893296 |
| 13 | 52437736924 |
| 14 | 305629528249 |
| 15 | 1781339432569 |
| 16 | 10382407067166 |
| 17 | 60513102970426 |
| 18 | 352696210755391 |
| 19 | 2055664161561919 |
| 20 | 11981288758616124 |
| 21 | 69832068390134824 |