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 | 0 |
| 1 | 0 |
| 2 | 1 |
| 3 | 0 |
| 4 | 3 |
| 5 | 6 |
| 6 | 9 |
| 7 | 22 |
| 8 | 47 |
| 9 | 88 |
| 10 | 179 |
| 11 | 354 |
| 12 | 691 |
| 13 | 1344 |
| 14 | 2617 |
| 15 | 5042 |
| 16 | 9709 |
| 17 | 18632 |
| 18 | 35639 |
| 19 | 68010 |
| 20 | 129556 |
| 21 | 246202 |
| 22 | 467188 |
| 23 | 885036 |
| 24 | 1674211 |
| 25 | 3163094 |
| 26 | 5969022 |
| 27 | 11251676 |
| 28 | 21189382 |
| 29 | 39867970 |
| 30 | 74950464 |
| 31 | 140798302 |
| 32 | 264313039 |
| 33 | 495861874 |
| 34 | 929709687 |
| 35 | 1742193854 |
| 36 | 3263069271 |
| 37 | 6108762316 |