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A146514 Number of nXn arrays of squares of integers summing to 20 with every element equal to at least one neighbor. 1
4, 96, 16816, 4506134, 921762154, 339740101635, 36832745153541 (list; graph; refs; listen; history; internal format)
OFFSET

2,1

CROSSREFS

Sequence in context: A111637 A027872 A203517 * A181335 A098695 A059201

Adjacent sequences:  A146511 A146512 A146513 * A146515 A146516 A146517

KEYWORD

nonn

AUTHOR

R. H. Hardin (rhhardin(AT)att.net) Apr 14 2009

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Last modified February 14 15:39 EST 2012. Contains 205635 sequences.