cp's OEIS Frontend

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.

A097421 a(n) = (5^(2^n) - 1)/2^(n+2).

Table of values

n a(n)
0 1
1 3
2 39
3 12207
4 2384185791
5 181898940354585647583
6 2117582368135750847670806251699104905128479
7 573971850987445072250359637315549647372395291392620860111695169081258427468128502368927

List of values

[1, 3, 39, 12207, 2384185791, 181898940354585647583, 2117582368135750847670806251699104905128479, 573971850987445072250359637315549647372395291392620860111695169081258427468128502368927]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

Content is available under The OEIS End-User License Agreement.