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 | -1 |
| 2 | -3 |
| 3 | -2 |
| 4 | -11 |
| 5 | -3 |
| 6 | -23 |
| 7 | -4 |
| 8 | -39 |
| 9 | -5 |
| 10 | -59 |
| 11 | -6 |
| 12 | -83 |
| 13 | -7 |
| 14 | -111 |
| 15 | -8 |
| 16 | -143 |
| 17 | -9 |
| 18 | -179 |
| 19 | -10 |
| 20 | -219 |
| 21 | -11 |
| 22 | -263 |
| 23 | -12 |
| 24 | -311 |
| 25 | -13 |
| 26 | -363 |
| 27 | -14 |
| 28 | -419 |
| 29 | -15 |
| 30 | -479 |
| 31 | -16 |
| 32 | -543 |
| 33 | -17 |
| 34 | -611 |
| 35 | -18 |
| 36 | -683 |
| 37 | -19 |
| 38 | -759 |
| 39 | -20 |
| 40 | -839 |
| 41 | -21 |
| 42 | -923 |
| 43 | -22 |
| 44 | -1011 |
| 45 | -23 |
| 46 | -1103 |
| 47 | -24 |
| 48 | -1199 |
| 49 | -25 |
| 50 | -1299 |
| 51 | -26 |
| 52 | -1403 |
| 53 | -27 |
| 54 | -1511 |
| 55 | -28 |
| 56 | -1623 |
| 57 | -29 |
| 58 | -1739 |