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) |
|---|---|
| 1 | 1 |
| 2 | -108 |
| 3 | -243 |
| 4 | -108 |
| 5 | -675 |
| 6 | -972 |
| 7 | -1323 |
| 8 | -243 |
| 9 | -300 |
| 10 | -3267 |
| 11 | -972 |
| 12 | -4563 |
| 13 | -5292 |
| 14 | -6075 |
| 15 | -867 |
| 16 | -972 |
| 17 | -1083 |
| 18 | -2700 |
| 19 | -11907 |
| 20 | -13068 |
| 21 | -14283 |
| 22 | -675 |
| 23 | -2028 |
| 24 | -588 |
| 25 | -22707 |
| 26 | -24300 |
| 27 | -25947 |
| 28 | -29403 |
| 29 | -31212 |
| 30 | -3675 |
| 31 | -972 |
| 32 | -4107 |
| 33 | -38988 |
| 34 | -41067 |
| 35 | -45387 |
| 36 | -47628 |
| 37 | -49923 |
| 38 | -1452 |
| 39 | -6075 |
| 40 | -6348 |
| 41 | -59643 |