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 | 1 |
| 2 | 1 |
| 3 | 1 |
| 4 | 0 |
| 5 | 2 |
| 6 | 1 |
| 7 | -1 |
| 8 | 3 |
| 9 | 3 |
| 10 | 1 |
| 11 | -1 |
| 12 | 4 |
| 13 | 8 |
| 14 | 4 |
| 15 | 1 |
| 16 | 0 |
| 17 | 5 |
| 18 | 21 |
| 19 | 15 |
| 20 | 5 |
| 21 | 1 |
| 22 | 1 |
| 23 | 6 |
| 24 | 55 |
| 25 | 56 |
| 26 | 24 |
| 27 | 6 |
| 28 | 1 |
| 29 | 1 |
| 30 | 7 |
| 31 | 144 |
| 32 | 209 |
| 33 | 115 |
| 34 | 35 |
| 35 | 7 |
| 36 | 1 |
| 37 | 0 |
| 38 | 8 |
| 39 | 377 |
| 40 | 780 |
| 41 | 551 |
| 42 | 204 |
| 43 | 48 |
| 44 | 8 |
| 45 | 1 |
| 46 | -1 |
| 47 | 9 |
| 48 | 987 |
| 49 | 2911 |
| 50 | 2640 |
| 51 | 1189 |
| 52 | 329 |
| 53 | 63 |
| 54 | 9 |
| 55 | 1 |
| 56 | -1 |
| 57 | 10 |
| 58 | 2584 |
| 59 | 10864 |
| 60 | 12649 |
| 61 | 6930 |
| 62 | 2255 |
| 63 | 496 |
| 64 | 80 |
| 65 | 10 |
| 66 | 1 |
| 67 | 0 |
| 68 | 11 |
| 69 | 6765 |
| 70 | 40545 |
| 71 | 60605 |
| 72 | 40391 |
| 73 | 15456 |
| 74 | 3905 |
| 75 | 711 |
| 76 | 99 |
| 77 | 11 |
| 78 | 1 |
| 79 | 1 |
| 80 | 12 |