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 | 2 |
| 2 | 3 |
| 3 | 2 |
| 4 | -1 |
| 5 | -4 |
| 6 | -4 |
| 7 | 0 |
| 8 | 7 |
| 9 | 10 |
| 10 | 5 |
| 11 | -8 |
| 12 | -20 |
| 13 | -18 |
| 14 | 1 |
| 15 | 28 |
| 16 | 40 |
| 17 | 20 |
| 18 | -25 |
| 19 | -64 |
| 20 | -59 |
| 21 | 2 |
| 22 | 81 |
| 23 | 114 |
| 24 | 55 |
| 25 | -74 |
| 26 | -178 |
| 27 | -158 |
| 28 | 9 |
| 29 | 220 |
| 30 | 301 |
| 31 | 144 |
| 32 | -183 |
| 33 | -444 |
| 34 | -390 |
| 35 | 16 |
| 36 | 518 |
| 37 | 706 |
| 38 | 330 |
| 39 | -430 |
| 40 | -1019 |
| 41 | -884 |
| 42 | 46 |
| 43 | 1170 |
| 44 | 1575 |
| 45 | 738 |
| 46 | -931 |
| 47 | -2202 |
| 48 | -1902 |
| 49 | 84 |
| 50 | 2460 |
| 51 | 3292 |
| 52 | 1523 |
| 53 | -1938 |
| 54 | -4541 |
| 55 | -3888 |
| 56 | 186 |
| 57 | 4994 |
| 58 | 6646 |
| 59 | 3066 |
| 60 | -3842 |