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 | 4 |
| 2 | 45 |
| 3 | 280 |
| 4 | 1105 |
| 5 | 3276 |
| 6 | 8029 |
| 7 | 17200 |
| 8 | 33345 |
| 9 | 59860 |
| 10 | 101101 |
| 11 | 162504 |
| 12 | 250705 |
| 13 | 373660 |
| 14 | 540765 |
| 15 | 762976 |
| 16 | 1052929 |
| 17 | 1425060 |
| 18 | 1895725 |
| 19 | 2483320 |
| 20 | 3208401 |
| 21 | 4093804 |
| 22 | 5164765 |
| 23 | 6449040 |
| 24 | 7977025 |
| 25 | 9781876 |
| 26 | 11899629 |
| 27 | 14369320 |
| 28 | 17233105 |
| 29 | 20536380 |
| 30 | 24327901 |