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 | 8 |
| 2 | 64 |
| 3 | 512 |
| 4 | 8192 |
| 5 | 65536 |
| 6 | 524288 |
| 7 | 8388608 |
| 8 | 67108864 |
| 9 | 536870912 |
| 10 | 8589934592 |
| 11 | 68719476736 |
| 12 | 549755813888 |
| 13 | 8796093022208 |
| 14 | 70368744177664 |
| 15 | 562949953421312 |
| 16 | 9007199254740992 |
| 17 | 72057594037927936 |
| 18 | 576460752303423488 |
| 19 | 9223372036854775808 |
| 20 | 73786976294838206464 |
| 21 | 590295810358705651712 |