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 | 7 |
| 3 | 148 |
| 4 | 8695 |
| 5 | 1455433 |
| 6 | 715092412 |
| 7 | 1046279830240 |
| 8 | 4581706851060703 |
| 9 | 60144130721142806611 |
| 10 | 2367934845363738749478583 |
| 11 | 279660212608573899258160179472 |
| 12 | 99083333806943049370375436233999876 |
| 13 | 105314387436569180750449877597844106742044 |