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 | 3 |
| 3 | 10 |
| 4 | 28 |
| 5 | 72 |
| 6 | 176 |
| 7 | 416 |
| 8 | 960 |
| 9 | 2176 |
| 10 | 4864 |
| 11 | 10752 |
| 12 | 23552 |
| 13 | 51200 |
| 14 | 110592 |
| 15 | 237568 |
| 16 | 507904 |
| 17 | 1081344 |
| 18 | 2293760 |
| 19 | 4849664 |
| 20 | 10223616 |
| 21 | 21495808 |
| 22 | 45088768 |
| 23 | 94371840 |
| 24 | 197132288 |
| 25 | 411041792 |
| 26 | 855638016 |
| 27 | 1778384896 |
| 28 | 3690987520 |
| 29 | 7650410496 |
| 30 | 15837691904 |
| 31 | 32749125632 |
| 32 | 67645734912 |
| 33 | 139586437120 |
| 34 | 287762808832 |