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 | 2 |
| 3 | 4 |
| 4 | 7 |
| 5 | 11 |
| 6 | 26 |
| 7 | 92 |
| 8 | 64 |
| 9 | -1328 |
| 10 | 2272 |
| 11 | 86912 |
| 12 | -157706 |
| 13 | -7271042 |
| 14 | 17815604 |
| 15 | 853696664 |
| 16 | -2615703541 |
| 17 | -133125019397 |
| 18 | 490820087366 |
| 19 | 26636670621548 |
| 20 | -114924854384183 |
| 21 | -6653655394184683 |
| 22 | 32904766004185814 |
| 23 | 2029701686588972068 |
| 24 | -11322597283993315976 |