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 | 1074 |
| 1 | 1086 |
| 2 | 1098 |
| 3 | 1320 |
| 4 | 3000 |
| 5 | 6360 |
| 6 | 13080 |
| 7 | 26520 |
| 8 | 64200 |
| 9 | 136680 |
| 10 | 303960 |
| 11 | 668040 |
| 12 | 1448760 |
| 13 | 2897880 |
| 14 | 6778920 |
| 15 | 14760600 |
| 16 | 31761720 |
| 17 | 75003840 |
| 18 | 189623520 |
| 19 | 475142400 |
| 20 | 1262108388 |
| 21 | 1723154620 |
| 22 | 2250655556 |
| 23 | 1742856988 |