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A159222
1/4 the number of n X n arrays of squares of integers with every 2X2 subblock summing to 21
0
7, 20, 45, 95, 193, 389, 777, 1553, 3097, 6185, 12345, 24665, 49273, 98489, 196857, 393593, 786937, 1573625, 3146745, 6292985, 12584953, 25168889, 50335737, 100669433, 201334777, 402665465
OFFSET
2,1
CROSSREFS
Sequence in context: A175428 A232599 A011934 * A100206 A298288 A299384
KEYWORD
nonn
AUTHOR
R. H. Hardin Apr 06 2009
STATUS
approved