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 | 1 |
| 1 | 1 |
| 2 | 4 |
| 3 | 6 |
| 4 | 19 |
| 5 | 33 |
| 6 | 93 |
| 7 | 175 |
| 8 | 460 |
| 9 | 910 |
| 10 | 2286 |
| 11 | 4676 |
| 12 | 11388 |
| 13 | 23842 |
| 14 | 56808 |
| 15 | 120926 |
| 16 | 283611 |
| 17 | 611065 |
| 18 | 1416625 |
| 19 | 3079635 |
| 20 | 7078263 |
| 21 | 15490553 |
| 22 | 35374519 |
| 23 | 77805481 |
| 24 | 176813809 |
| 25 | 390379483 |
| 26 | 883861033 |
| 27 | 1957097715 |
| 28 | 4418562265 |
| 29 | 9805546875 |
| 30 | 22090136885 |