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 | 2 |
| 2 | 2 |
| 3 | 1 |
| 4 | -1 |
| 5 | -4 |
| 6 | -7 |
| 7 | -8 |
| 8 | -5 |
| 9 | 3 |
| 10 | 15 |
| 11 | 27 |
| 12 | 32 |
| 13 | 22 |
| 14 | -8 |
| 15 | -55 |
| 16 | -104 |
| 17 | -128 |
| 18 | -95 |
| 19 | 17 |
| 20 | 200 |
| 21 | 399 |
| 22 | 510 |
| 23 | 405 |
| 24 | -11 |
| 25 | -721 |
| 26 | -1525 |
| 27 | -2024 |
| 28 | -1708 |
| 29 | -172 |
| 30 | 2573 |
| 31 | 5806 |
| 32 | 8002 |
| 33 | 7137 |
| 34 | 1503 |
| 35 | -9072 |
| 36 | -22015 |
| 37 | -31520 |
| 38 | -29585 |
| 39 | -9073 |
| 40 | 31519 |
| 41 | 83119 |
| 42 | 123712 |
| 43 | 121778 |
| 44 | 47732 |
| 45 | -107499 |
| 46 | -312396 |
| 47 | -483840 |
| 48 | -498119 |
| 49 | -233455 |
| 50 | 357884 |
| 51 | 1168399 |
| 52 | 1885694 |
| 53 | 2025929 |
| 54 | 1090985 |
| 55 | -1152593 |