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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.

A068531 a(n) = (3^(2^n) - 1)/2^(n + 2).

Table of values

n a(n)
1 1
2 5
3 205
4 672605
5 14476720225405
6 13412827423017626893194723005
7 23027704253395670256876704807446325518902757016163752166205
8 135750441774555403090761510536778616322479346492704236319926586357457102177506285098634540189560165548644204629442284605

List of values

[1, 5, 205, 672605, 14476720225405, 13412827423017626893194723005, 23027704253395670256876704807446325518902757016163752166205, 135750441774555403090761510536778616322479346492704236319926586357457102177506285098634540189560165548644204629442284605]

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

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