A234115 Number of (n+1)X(n+1) 0..2 arrays with every 2X2 subblock having the absolute values of all six edge and diagonal differences no larger than 1.

31, 1361, 231713, 157630963, 427196005695, 4625943683805313, 200376051988817866625, 34754816964141969688314115, 24157262935852623408023272643359, 67332158893994957162261589597358347857

Offset: 1

Author

R. H. Hardin, Dec 19 2013

Keywords

• nonn

Comments

Diagonal of A234122

Examples

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

Links

• R. H. Hardin, Table of n, a(n) for n = 1..13