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 | 499999999 |
| 2 | 166666666 |
| 3 | 66666666 |
| 4 | 38095237 |
| 5 | 20779220 |
| 6 | 15984016 |
| 7 | 11282834 |
| 8 | 9501331 |
| 9 | 7435826 |
| 10 | 5640969 |
| 11 | 5095068 |
| 12 | 4131143 |
| 13 | 3627360 |
| 14 | 3374293 |
| 15 | 3015292 |
| 16 | 2616982 |
| 17 | 2306411 |
| 18 | 2192860 |
| 19 | 1963654 |
| 20 | 1825278 |
| 21 | 1750219 |
| 22 | 1595163 |
| 23 | 1499127 |
| 24 | 1381337 |
| 25 | 1253379 |
| 26 | 1191536 |