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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.

A261067 a(n) = (11^(2^n) - 1)/2^(n + 2).

Table of values

n a(n)
1 15
2 915
3 6698715
4 717964529118315
5 16495138082306681918325119173515
6 17413733142679306233865281770975943513633443105435651232476307915

List of values

[15, 915, 6698715, 717964529118315, 16495138082306681918325119173515, 17413733142679306233865281770975943513633443105435651232476307915]

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

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