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) |
|---|---|
| 2 | 15 |
| 3 | 145 |
| 4 | 670 |
| 5 | 2146 |
| 6 | 5501 |
| 7 | 12131 |
| 8 | 23996 |
| 9 | 43716 |
| 10 | 74667 |
| 11 | 121077 |
| 12 | 188122 |
| 13 | 282022 |
| 14 | 410137 |
| 15 | 581063 |
| 16 | 804728 |
| 17 | 1092488 |
| 18 | 1457223 |
| 19 | 1913433 |
| 20 | 2477334 |
| 21 | 3166954 |
| 22 | 4002229 |
| 23 | 5005099 |
| 24 | 6199604 |
| 25 | 7611980 |
| 26 | 9270755 |
| 27 | 11206845 |
| 28 | 13453650 |
| 29 | 16047150 |