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 | 2 |
| 2 | 4 |
| 3 | 8 |
| 4 | 16 |
| 5 | 30 |
| 6 | 52 |
| 7 | 84 |
| 8 | 128 |
| 9 | 186 |
| 10 | 260 |
| 11 | 352 |
| 12 | 464 |
| 13 | 598 |
| 14 | 756 |
| 15 | 940 |
| 16 | 1152 |
| 17 | 1394 |
| 18 | 1668 |
| 19 | 1976 |
| 20 | 2320 |
| 21 | 2702 |
| 22 | 3124 |
| 23 | 3588 |
| 24 | 4096 |
| 25 | 4650 |
| 26 | 5252 |
| 27 | 5904 |
| 28 | 6608 |
| 29 | 7366 |
| 30 | 8180 |
| 31 | 9052 |
| 32 | 9984 |
| 33 | 10978 |
| 34 | 12036 |
| 35 | 13160 |
| 36 | 14352 |
| 37 | 15614 |
| 38 | 16948 |
| 39 | 18356 |
| 40 | 19840 |
| 41 | 21402 |
| 42 | 23044 |