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 | 20 |
| 2 | 340 |
| 3 | 1220 |
| 4 | 1420 |
| 5 | 2020 |
| 6 | 2980 |
| 7 | 3340 |
| 8 | 3940 |
| 9 | 4460 |
| 10 | 4540 |
| 11 | 4580 |
| 12 | 5140 |
| 13 | 5660 |
| 14 | 5780 |
| 15 | 6260 |
| 16 | 6340 |
| 17 | 6620 |
| 18 | 6940 |
| 19 | 7060 |
| 20 | 7580 |
| 21 | 7660 |
| 22 | 7780 |
| 23 | 7940 |
| 24 | 8020 |
| 25 | 8980 |
| 26 | 9140 |
| 27 | 9260 |
| 28 | 9580 |
| 29 | 10420 |
| 30 | 10820 |
| 31 | 11140 |
| 32 | 11380 |
| 33 | 11740 |
| 34 | 12140 |
| 35 | 12340 |
| 36 | 12860 |
| 37 | 13220 |
| 38 | 13540 |
| 39 | 14020 |
| 40 | 15020 |
| 41 | 15140 |
| 42 | 15740 |
| 43 | 15940 |
| 44 | 16540 |
| 45 | 16780 |