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.

A069449 Half the number of 4 X n binary arrays with no path of adjacent 1's or adjacent 0's from top to bottom or side to side.

Original entry on oeis.org

7, 269, 5799, 95783, 1389619, 18772467, 243194821, 3070812013
Offset: 2

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Author

R. H. Hardin, Mar 22 2002

Keywords

Crossrefs

Cf. 2 X n A000225, vertical path of 1 A069361-A069395, vertical paths of 0+1 A069396-A069416, vertical path of 1 not 0 A069417-A069428, no vertical paths A069429-A069447, no horizontal or vertical paths A069448-A069452.

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

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