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 | 2 |
| 3 | 2 |
| 4 | 0 |
| 5 | -5 |
| 6 | -14 |
| 7 | -28 |
| 8 | -48 |
| 9 | -75 |
| 10 | -110 |
| 11 | -154 |
| 12 | -208 |
| 13 | -273 |
| 14 | -350 |
| 15 | -440 |
| 16 | -544 |
| 17 | -663 |
| 18 | -798 |
| 19 | -950 |
| 20 | -1120 |
| 21 | -1309 |
| 22 | -1518 |
| 23 | -1748 |
| 24 | -2000 |
| 25 | -2275 |
| 26 | -2574 |
| 27 | -2898 |
| 28 | -3248 |
| 29 | -3625 |
| 30 | -4030 |
| 31 | -4464 |
| 32 | -4928 |
| 33 | -5423 |
| 34 | -5950 |
| 35 | -6510 |
| 36 | -7104 |
| 37 | -7733 |
| 38 | -8398 |
| 39 | -9100 |
| 40 | -9840 |
| 41 | -10619 |
| 42 | -11438 |