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A162093
Number of n X n symmetric binary arrays with rows, considered as binary numbers, in strictly increasing order, and no more than 3 ones in any row
0
2, 3, 9, 41, 205, 1190, 7529, 51751, 387737, 3113542, 26765060, 244702054, 2367701249, 24169612036, 259289525510, 2915165124175, 34258966408875
OFFSET
1,1
CROSSREFS
Sequence in context: A328436 A125052 A181139 * A052828 A214915 A219673
KEYWORD
nonn
AUTHOR
R. H. Hardin Jun 25 2009
STATUS
approved