A133792 Number of n X n binary matrices with every 1 adjacent to some 0 and every 0 adjacent to some 1, horizontally or vertically.

6, 126, 8950, 2308238, 2129167114, 7077040829290, 84651408281226926, 3644360411354234096546, 564689913941224929404667818, 314919227342521055797569563796454

Offset

2,1

Links

Table of n, a(n) for n=2..11.

Crossrefs

Sequence in context: A004993 A237428 A255900 * A081623 A223210 A324093

Adjacent sequences: A133789 A133790 A133791 * A133793 A133794 A133795

Keyword

nonn

Author

R. H. Hardin, Jan 05 2008

Status

approved