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) |
|---|---|
| 3 | 1 |
| 4 | 1 |
| 5 | 1 |
| 6 | 3 |
| 7 | 3 |
| 8 | 7 |
| 9 | 8 |
| 10 | 17 |
| 11 | 21 |
| 12 | 47 |
| 13 | 63 |
| 14 | 132 |
| 15 | 205 |
| 16 | 411 |
| 17 | 685 |
| 18 | 1353 |
| 19 | 2385 |
| 20 | 4643 |
| 21 | 8496 |
| 22 | 16430 |
| 23 | 30735 |
| 24 | 59343 |
| 25 | 112531 |
| 26 | 217245 |
| 27 | 415628 |
| 28 | 803209 |
| 29 | 1545463 |
| 30 | 2991191 |
| 31 | 5778267 |
| 32 | 11201883 |
| 33 | 21702708 |
| 34 | 42141575 |
| 35 | 81830748 |
| 36 | 159140895 |
| 37 | 309590883 |
| 38 | 602938098 |
| 39 | 1174779397 |
| 40 | 2290920127 |