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 | 10 |
| 2 | 110 |
| 3 | 1210 |
| 4 | 13310 |
| 5 | 146410 |
| 6 | 1610510 |
| 7 | 17715610 |
| 8 | 194871710 |
| 9 | 2143588810 |
| 10 | 23579476910 |
| 11 | 259374246010 |
| 12 | 2853116706110 |
| 13 | 31384283767210 |
| 14 | 345227121439310 |
| 15 | 3797498335832410 |
| 16 | 41772481694156510 |
| 17 | 459497298635721610 |
| 18 | 5054470284992937710 |
| 19 | 55599173134922314810 |
| 20 | 611590904484145462910 |