OFFSET
2,1
COMMENTS
Same series for 1/8 the number of n X n arrays of squares of integers with every 2X2 subblock summing to 9
Same series for 1/8 the number of n X n arrays of squares of integers with every 2X2 subblock summing to 13
Same series for 1/8 the number of n X n arrays of squares of integers with every 2X2 subblock summing to 19
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Apr 06 2009
STATUS
approved