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 | 1 |
| 3 | 0 |
| 4 | -2 |
| 5 | -5 |
| 6 | -7 |
| 7 | -4 |
| 8 | 10 |
| 9 | 38 |
| 10 | 70 |
| 11 | 68 |
| 12 | -40 |
| 13 | -329 |
| 14 | -767 |
| 15 | -1012 |
| 16 | -214 |
| 17 | 2842 |
| 18 | 8642 |
| 19 | 14332 |
| 20 | 10136 |
| 21 | -21622 |
| 22 | -96578 |
| 23 | -196412 |
| 24 | -213080 |
| 25 | 96264 |
| 26 | 1037344 |
| 27 | 2608788 |
| 28 | 3698996 |
| 29 | 1121127 |
| 30 | -10234567 |
| 31 | -33425980 |
| 32 | -58537486 |
| 33 | -45735382 |
| 34 | 83471346 |
| 35 | 408899204 |
| 36 | 871127040 |