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 | 0 |
| 1 | 1 |
| 2 | -3 |
| 3 | 0 |
| 4 | -8 |
| 5 | -3 |
| 6 | -15 |
| 7 | -8 |
| 8 | -24 |
| 9 | -15 |
| 10 | -35 |
| 11 | -24 |
| 12 | -48 |
| 13 | -35 |
| 14 | -63 |
| 15 | -48 |
| 16 | -80 |
| 17 | -63 |
| 18 | -99 |
| 19 | -80 |
| 20 | -120 |
| 21 | -99 |
| 22 | -143 |
| 23 | -120 |
| 24 | -168 |
| 25 | -143 |
| 26 | -195 |
| 27 | -168 |
| 28 | -224 |
| 29 | -195 |
| 30 | -255 |
| 31 | -224 |
| 32 | -288 |
| 33 | -255 |
| 34 | -323 |
| 35 | -288 |
| 36 | -360 |
| 37 | -323 |
| 38 | -399 |
| 39 | -360 |
| 40 | -440 |
| 41 | -399 |
| 42 | -483 |
| 43 | -440 |
| 44 | -528 |
| 45 | -483 |
| 46 | -575 |
| 47 | -528 |
| 48 | -624 |
| 49 | -575 |
| 50 | -675 |
| 51 | -624 |
| 52 | -728 |
| 53 | -675 |
| 54 | -783 |