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 | 10 |
| 2 | 65 |
| 3 | 330 |
| 4 | 1430 |
| 5 | 5512 |
| 6 | 19415 |
| 7 | 63570 |
| 8 | 195910 |
| 9 | 573430 |
| 10 | 1605340 |
| 11 | 4322110 |
| 12 | 11240645 |
| 13 | 28341730 |
| 14 | 69488650 |
| 15 | 166096270 |
| 16 | 387890625 |
| 17 | 886698670 |
| 18 | 1987322415 |
| 19 | 4373271870 |
| 20 | 9461022285 |
| 21 | 20144164040 |
| 22 | 42254620785 |
| 23 | 87398226990 |
| 24 | 178396331100 |
| 25 | 359618772656 |
| 26 | 716409453320 |