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 | 3 |
| 2 | 51 |
| 3 | 1119 |
| 4 | 29103 |
| 5 | 859143 |
| 6 | 28091463 |
| 7 | 1002057591 |
| 8 | 38606468343 |
| 9 | 1595167432599 |
| 10 | 70315835952471 |
| 11 | 3293268346004439 |
| 12 | 163337193581191575 |
| 13 | 8554718468806548951 |
| 14 | 471976737725208306327 |
| 15 | 27369722655919760451159 |
| 16 | 1664858070989667129693975 |
| 17 | 106029602841882346657155543 |