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) |
|---|---|
| 1 | 75 |
| 2 | 4225 |
| 3 | 277048 |
| 4 | 21171189 |
| 5 | 1709600811 |
| 6 | 142913828920 |
| 7 | 12272577818050 |
| 8 | 1075207199997332 |
| 9 | 95673602693282038 |
| 10 | 8617752113620426557 |
| 11 | 783964147695858014234 |
| 12 | 71904055278788602481892 |
| 13 | 6640510710493148698166594 |
| 14 | 616876923984020487671442310 |
| 15 | 57596211829372496930445843340 |