A183366 Number of n X 4 binary arrays with no element equal to the sum modulo 3 of its horizontal and vertical neighbors.

3, 12, 39, 138, 548, 2129, 8311, 32933, 130750, 519980, 2069494, 8238734, 32801506, 130618157, 520176813, 2071605150, 8250287558, 32857555574, 130858980239, 521161959522, 2075594388132, 8266327630092, 32921750282882, 131115278622574, 522184203094342, 2079668830404846

Offset: 1

Author

R. H. Hardin, Jan 04 2011

Keywords

• nonn

Examples

			Some solutions for 5 X 4:
  1 0 1 0    1 0 0 0    1 1 0 0    1 1 0 0    1 1 1 0
  0 0 0 1    0 0 1 1    1 1 0 1    1 1 0 1    1 0 1 0
  0 1 0 0    1 0 1 1    0 0 0 0    0 0 0 0    1 1 1 0
  1 0 0 1    0 0 1 1    1 1 1 0    0 1 1 1    0 0 0 0
  0 0 1 0    1 0 0 0    1 1 1 0    0 1 1 1    1 0 0 1
		

Links

• R. H. Hardin, Table of n, a(n) for n = 1..200

Crossrefs

Column 4 of A183368.