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 | 186300 |
| 2 | 887220 |
| 3 | 3060360 |
| 4 | 9883440 |
| 5 | 26969040 |
| 6 | 67288830 |
| 7 | 141778440 |
| 8 | 256463820 |
| 9 | 399874640 |
| 10 | 547907454 |
| 11 | 670419540 |
| 12 | 742419510 |
| 13 | 744780330 |
| 14 | 701747010 |
| 15 | 607809750 |
| 16 | 520591950 |
| 17 | 377521875 |
| 18 | 312082260 |
| 19 | 198307620 |
| 20 | 158606532 |
| 21 | 87210930 |
| 22 | 63688410 |
| 23 | 33243120 |
| 24 | 25703205 |
| 25 | 11343906 |
| 26 | 6764940 |
| 27 | 3272500 |
| 28 | 2003805 |
| 29 | 1532340 |
| 30 | 757080 |
| 31 | 211410 |
| 32 | 212625 |
| 33 | 198345 |
| 34 | 138600 |
| 35 | 82512 |
| 36 | 21080 |
| 37 | 16200 |
| 38 | 15750 |
| 39 | 14910 |
| 40 | 13545 |
| 41 | 7245 |
| 42 | 3270 |
| 43 | 630 |
| 44 | 45 |
| 45 | 1 |