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Search: id:A051587
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| A051587 |
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Number of 4 X n binary matrices such that any 2 rows have a common 1. |
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+0
4
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| 0, 1, 31, 781, 17887, 380821, 7635991, 145858861, 2680379887, 47772681541, 831224886151, 14192847754141, 238791235611487, 3971678627940661, 65470546978625911, 1071778956904132621, 17451563620410100687
(list; graph; listen)
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OFFSET
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0,3
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REFERENCES
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V. Jovovic, G. Kilibarda, On the number of Boolean functions in the Post classes F^{mu}_8, Diskretnaya Matematika, 11 (1999), no. 4, 127-138 (translated in Discrete Mathematics and Applications, 9, (1999), no. 6).
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FORMULA
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a(n)=16^n-6*12^n+12*10^n-9^n-16*8^n+15*7^n-6*6^n+5^n.
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CROSSREFS
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Sequence in context: A061252 A096049 A166488 this_sequence A069380 A006111 A157878
Adjacent sequences: A051584 A051585 A051586 this_sequence A051588 A051589 A051590
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KEYWORD
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nonn
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AUTHOR
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Vladeta Jovovic, Goran Kilibarda (vladeta(AT)eunet.rs)
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