A237014 Number of (n+1)X(7+1) 0..3 arrays with the sum of all four elements of every 2X2 subblock equal.

204304, 286168, 431584, 755752, 1419088, 2995048, 6637792, 15955528, 39765904, 105137128, 285942304, 813043912

Offset

1,1

Comments

Column 7 of A237015

Links

Table of n, a(n) for n=1..12.

Example

Some solutions for n=1
..2..3..3..3..3..1..3..2....2..2..2..2..3..3..1..0....2..0..1..0..3..3..3..0
..1..0..0..0..0..2..0..1....2..1..2..1..1..0..3..3....1..3..2..3..0..0..0..3

Crossrefs

Sequence in context: A248203 A235854 A203911 * A218448 A234836 A206093

Adjacent sequences: A237011 A237012 A237013 * A237015 A237016 A237017

Keyword

nonn

Author

R. H. Hardin, Feb 02 2014

Status

approved