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A159229 1/16 the number of nXn arrays of squares of integers with every 2X2 subblock summing to 30 +0
1
3, 11, 29, 77, 189, 509, 1277, 3581, 9213, 26621, 69629, 204797, 540669, 1605629, 4259837, 12713981, 33816573, 101187581 (list; graph; listen)
OFFSET

2,1
CROSSREFS

Sequence in context: A072610 A110954 A000251 this_sequence A122023 A009183 A165893

Adjacent sequences: A159226 A159227 A159228 this_sequence A159230 A159231 A159232

KEYWORD

nonn

AUTHOR

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

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.

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