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 | -15 |
| 2 | 106 |
| 3 | -469 |
| 4 | 1457 |
| 5 | -3381 |
| 6 | 6099 |
| 7 | -8829 |
| 8 | 10624 |
| 9 | -11208 |
| 10 | 11274 |
| 11 | -11858 |
| 12 | 13447 |
| 13 | -15709 |
| 14 | 18001 |
| 15 | -20090 |
| 16 | 22420 |
| 17 | -25667 |
| 18 | 29965 |
| 19 | -34627 |
| 20 | 38835 |
| 21 | -42687 |
| 22 | 47352 |
| 23 | -53944 |
| 24 | 62270 |
| 25 | -70875 |
| 26 | 78399 |
| 27 | -84913 |
| 28 | 91988 |
| 29 | -101370 |
| 30 | 113336 |
| 31 | -126336 |
| 32 | 138584 |
| 33 | -150174 |
| 34 | 163347 |
| 35 | -180341 |
| 36 | 200990 |
| 37 | -222634 |
| 38 | 242515 |