2,1

Same series for 1/8 the number of nXn arrays of squares of integers with every 2X2 subblock summing to 9

Same series for 1/8 the number of nXn arrays of squares of integers with every 2X2 subblock summing to 13

Same series for 1/8 the number of nXn arrays of squares of integers with every 2X2 subblock summing to 19

Sequence in context: A032442 A102688 A001629 this_sequence A068034 A084215 A024810

Adjacent sequences: A159227 A159228 A159229 this_sequence A159231 A159232 A159233

nonn

Ron Hardin (rhhardin(AT)att.net) Apr 06 2009