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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.

A173506 a(n) = (3^(3^n) - 1)/2.

Table of values

n	a(n)
0	1
1	13
2	9841
3	3812798742493
4	221713244121518884974124815309574946401

List of values

[1, 13, 9841, 3812798742493, 221713244121518884974124815309574946401]

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

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