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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.

A081739 a(n) = (-1/2^n)*(A000367(2^n)+1).

Table of values

n a(n)
1 0
2 0
3 452
4 481832565076
5 3336994692120829058949545155598207748188
6 4183667308477313795108662587270037418426429056133620947343416969739965511482242658521291610836247844507748569589344

List of values

[0, 0, 452, 481832565076, 3336994692120829058949545155598207748188, 4183667308477313795108662587270037418426429056133620947343416969739965511482242658521291610836247844507748569589344]

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

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