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 | -6 |
| 2 | 9 |
| 3 | 16 |
| 4 | -66 |
| 5 | 54 |
| 6 | 98 |
| 7 | -300 |
| 8 | 243 |
| 9 | 364 |
| 10 | -1128 |
| 11 | 828 |
| 12 | 1221 |
| 13 | -3498 |
| 14 | 2511 |
| 15 | 3528 |
| 16 | -9876 |
| 17 | 6804 |
| 18 | 9358 |
| 19 | -25428 |
| 20 | 17217 |
| 21 | 23068 |
| 22 | -61644 |
| 23 | 40824 |
| 24 | 53916 |
| 25 | -141318 |
| 26 | 92340 |
| 27 | 119912 |
| 28 | -310554 |
| 29 | 199980 |
| 30 | 256792 |
| 31 | -656436 |
| 32 | 418311 |
| 33 | 530960 |
| 34 | -1344144 |
| 35 | 847584 |
| 36 | 1066157 |
| 37 | -2673372 |
| 38 | 1671741 |
| 39 | 2084464 |
| 40 | -5186118 |
| 41 | 3216834 |
| 42 | 3981926 |
| 43 | -9832752 |
| 44 | 6057504 |
| 45 | 7445924 |
| 46 | -18269124 |
| 47 | 11181636 |
| 48 | 13661725 |
| 49 | -33315852 |
| 50 | 20274948 |
| 51 | 24630344 |
| 52 | -59740716 |