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A140786
Number of n X n symmetric binary matrices with no more than one greater count of 1s than 0s in and to the left of any position.
+0
1
1, 2, 5, 30, 230, 4600, 118735, 8311450, 756803538, 190714491576, 62835570762274, 58060067384341176, 70381397432713019444, 241548955989071082731808, 1090217292455289464608212443, 14031096553899575409507694141410
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Maintained by
N. J. A. Sloane
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njas@research.att.com
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Last modified December 20 00:58 EST 2009. Contains 171054 sequences.
AT&T Labs Research
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