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 | 1 |
| 2 | 8 |
| 3 | 90 |
| 4 | 385 |
| 5 | 2556 |
| 6 | 5138 |
| 7 | 15590 |
| 8 | 24646 |
| 9 | 53993 |
| 10 | 139199 |
| 11 | 182476 |
| 12 | 375363 |
| 13 | 569617 |
| 14 | 691012 |
| 15 | 991150 |
| 16 | 1613115 |
| 17 | 2490040 |
| 18 | 2849478 |
| 19 | 4163793 |
| 20 | 5263838 |
| 21 | 5888203 |
| 22 | 8100907 |
| 23 | 9886861 |
| 24 | 13102875 |
| 25 | 18538021 |
| 26 | 21816421 |
| 27 | 23608907 |
| 28 | 27525519 |
| 29 | 29659283 |
| 30 | 34290671 |