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 | 10 |
| 1 | 100 |
| 2 | 1090 |
| 3 | 11980 |
| 4 | 131770 |
| 5 | 1449460 |
| 6 | 15944050 |
| 7 | 175384540 |
| 8 | 1929229930 |
| 9 | 21221529220 |
| 10 | 233436821410 |
| 11 | 2567805035500 |
| 12 | 28245855390490 |
| 13 | 310704409295380 |
| 14 | 3417748502249170 |
| 15 | 37595233524740860 |
| 16 | 413547568772149450 |
| 17 | 4549023256493643940 |
| 18 | 50039255821430083330 |
| 19 | 550431814035730916620 |