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 | -4 |
| 2 | 11 |
| 3 | -24 |
| 4 | 48 |
| 5 | -92 |
| 6 | 170 |
| 7 | -304 |
| 8 | 526 |
| 9 | -884 |
| 10 | 1451 |
| 11 | -2336 |
| 12 | 3700 |
| 13 | -5772 |
| 14 | 8876 |
| 15 | -13472 |
| 16 | 20207 |
| 17 | -29988 |
| 18 | 44072 |
| 19 | -64184 |
| 20 | 92680 |
| 21 | -132760 |
| 22 | 188758 |
| 23 | -266512 |
| 24 | 373838 |
| 25 | -521152 |
| 26 | 722266 |
| 27 | -995432 |
| 28 | 1364684 |
| 29 | -1861548 |
| 30 | 2527224 |
| 31 | -3415344 |
| 32 | 4595497 |
| 33 | -6157700 |
| 34 | 8218050 |
| 35 | -10925848 |