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 | 1 |
| 1 | 0 |
| 2 | 1 |
| 3 | 1 |
| 4 | 2 |
| 5 | 1 |
| 6 | 2 |
| 7 | 1 |
| 8 | 2 |
| 9 | 0 |
| 10 | 0 |
| 11 | -3 |
| 12 | -3 |
| 13 | -8 |
| 14 | -10 |
| 15 | -16 |
| 16 | -20 |
| 17 | -29 |
| 18 | -35 |
| 19 | -47 |
| 20 | -56 |
| 21 | -72 |
| 22 | -85 |
| 23 | -105 |
| 24 | -122 |
| 25 | -148 |
| 26 | -171 |
| 27 | -202 |
| 28 | -231 |
| 29 | -270 |
| 30 | -306 |
| 31 | -353 |
| 32 | -397 |
| 33 | -453 |
| 34 | -507 |
| 35 | -573 |
| 36 | -637 |
| 37 | -715 |
| 38 | -791 |
| 39 | -881 |
| 40 | -970 |
| 41 | -1075 |
| 42 | -1178 |
| 43 | -1298 |
| 44 | -1417 |
| 45 | -1554 |
| 46 | -1691 |
| 47 | -1846 |
| 48 | -2001 |
| 49 | -2177 |
| 50 | -2353 |
| 51 | -2550 |
| 52 | -2748 |
| 53 | -2969 |