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A159230
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1/8 the number of nXn arrays of squares of integers with every 2X2 subblock summing to 31
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0
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2, 5, 10, 20, 38, 74, 142, 278, 542, 1070, 2110, 4190, 8318, 16574, 33022, 65918, 131582, 262910, 525310, 1050110, 2099198, 4197374, 8392702, 16783358, 33562622, 67121150, 134234110
(list; graph; refs; listen; history; internal format)
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OFFSET
| 2,1
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COMMENTS
| 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
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CROSSREFS
| Sequence in context: A032442 A102688 A001629 * A181366 A068034 A084215
Adjacent sequences: A159227 A159228 A159229 * A159231 A159232 A159233
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KEYWORD
| nonn
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AUTHOR
| R. H. Hardin (rhhardin(AT)att.net) Apr 06 2009
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