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 | 17 |
| 2 | 181 |
| 3 | 2008 |
| 4 | 22269 |
| 5 | 143285 |
| 6 | 1692737 |
| 7 | 18772741 |
| 8 | 208192888 |
| 9 | 2308894509 |
| 10 | 14856075365 |
| 11 | 175506357617 |
| 12 | 1946395332181 |
| 13 | 21585855011608 |
| 14 | 138889450176440 |
| 15 | 1640808956134074 |
| 16 | 18196850168753057 |
| 17 | 201806160812417701 |
| 18 | 2238064619105347768 |
| 19 | 14400335971854080600 |
| 20 | 170122354174067662074 |