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.

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A094538 Number of ternary words of length n that are not "bifix-free".

Original entry on oeis.org

0, 0, 3, 9, 33, 99, 315, 945, 2883, 8649, 26091, 78273, 235233, 705699, 2118339, 6355017, 19068729, 57206187, 171629595, 514888785, 1544699313, 4634097939, 13902392691, 41707178073, 125121830427, 375365491281
Offset: 0

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Author

N. J. A. Sloane, Jun 06 2004

Keywords

Crossrefs

See A019308 and A003000 for much more information. Cf. A094539.

Formula

Equals 3^n - A019308(n).
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Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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