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 | 78125 |
| 2 | 4782969 |
| 3 | 62748517 |
| 4 | 410338673 |
| 5 | 1801088541 |
| 6 | 6103515625 |
| 7 | 17249876309 |
| 8 | 42618442977 |
| 9 | 94931877133 |
| 10 | 194754273881 |
| 11 | 373669453125 |
| 12 | 678223072849 |
| 13 | 1174711139837 |
| 14 | 1954897493193 |
| 15 | 3142742836021 |
| 16 | 4902227890625 |
| 17 | 7446353252589 |
| 18 | 11047398519097 |
| 19 | 16048523266853 |
| 20 | 22876792454961 |