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A029891
Number of even graphical partitions.
2
1, 3, 7, 23, 70, 242, 832, 2983, 10759, 39482, 145892, 543877, 2038831, 7685211, 29092055, 110554267, 421495147, 1611676767
OFFSET
1,2
REFERENCES
R. A. Brualdi, H. J. Ryser, Combinatorial Matrix Theory, Cambridge Univ. Press, 1992.
FORMULA
Calculated using Cor. 6.3.3, Th. 6.3.6, Cor. 6.2.5 of Brualdi-Ryser.
CROSSREFS
KEYWORD
nonn
AUTHOR
TORSTEN.SILLKE(AT)LHSYSTEMS.COM
STATUS
approved