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 | -1 |
| 2 | -2 |
| 3 | -1 |
| 4 | -1 |
| 5 | 3 |
| 6 | 1 |
| 7 | 7 |
| 8 | 4 |
| 9 | 4 |
| 10 | 4 |
| 11 | 2 |
| 12 | -9 |
| 13 | -7 |
| 14 | -7 |
| 15 | -28 |
| 16 | -17 |
| 17 | -25 |
| 18 | -15 |
| 19 | -24 |
| 20 | -11 |
| 21 | -8 |
| 22 | 34 |
| 23 | 19 |
| 24 | 53 |
| 25 | 46 |
| 26 | 108 |
| 27 | 110 |
| 28 | 106 |
| 29 | 113 |
| 30 | 122 |
| 31 | 108 |
| 32 | 75 |
| 33 | 103 |
| 34 | -16 |
| 35 | -87 |
| 36 | -107 |
| 37 | -169 |
| 38 | -329 |
| 39 | -257 |
| 40 | -574 |
| 41 | -501 |
| 42 | -676 |
| 43 | -609 |
| 44 | -749 |
| 45 | -588 |
| 46 | -808 |
| 47 | -548 |
| 48 | -521 |
| 49 | -315 |
| 50 | -240 |
| 51 | 369 |
| 52 | 485 |
| 53 | 865 |
| 54 | 1099 |
| 55 | 1738 |
| 56 | 2129 |
| 57 | 2686 |
| 58 | 3088 |
| 59 | 3460 |
| 60 | 4103 |
| 61 | 4011 |
| 62 | 4480 |
| 63 | 3983 |