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 | 2 |
| 2 | 4 |
| 3 | 6 |
| 4 | 16 |
| 5 | 20 |
| 6 | 52 |
| 7 | 80 |
| 8 | 176 |
| 9 | 296 |
| 10 | 592 |
| 11 | 1104 |
| 12 | 2064 |
| 13 | 3936 |
| 14 | 7296 |
| 15 | 14048 |
| 16 | 25984 |
| 17 | 49600 |
| 18 | 92736 |
| 19 | 175872 |
| 20 | 330240 |
| 21 | 623232 |
| 22 | 1175296 |
| 23 | 2213632 |
| 24 | 4176128 |
| 25 | 7863808 |
| 26 | 14838784 |
| 27 | 27948544 |
| 28 | 52707328 |
| 29 | 99320832 |
| 30 | 187257856 |
| 31 | 352940032 |
| 32 | 665276416 |
| 33 | 1254090752 |
| 34 | 2363805696 |
| 35 | 4455927808 |