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Search: id:A090015
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| A090015 |
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Permanent of (0,1)-matrix of size n X (n+d) with d=5 and n-1 zeros not on a line. |
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+0
2
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| 6, 36, 258, 2136, 19998, 208524, 2393754, 29976192, 406446774, 5930064372, 92608986546, 1541044428456, 27216454135758, 508388707585116, 10013199347882058, 207381428863832784, 4505207996358719334
(list; graph; listen)
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OFFSET
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1,1
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REFERENCES
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Brualdi, Richard A. and Ryser, Herbert J., Combinatorial Matrix Theory, Cambridge NY (1991), Chapter 7.
Seok-Zun Song et al., Extremes of permanents of (0,1)-matrices, Lin. Algebra and its Applic. 373 (2003), p. 197-210.
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FORMULA
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a(n) = (n+4)*a(n-1) + (n-2)*a(n-2), a(1)=6, a(2)=36
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CROSSREFS
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a(n) = A001910(n-1) + A001910(n), a(1)=6
Cf. A000255, A000153, A000261, A001909, A001910, A090010, A055790, A090012-A090016.
Sequence in context: A049431 A049428 A129063 this_sequence A144892 A134008 A125795
Adjacent sequences: A090012 A090013 A090014 this_sequence A090016 A090017 A090018
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KEYWORD
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nonn,easy
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AUTHOR
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Jaap Spies (j.spies(AT)hccnet.nl), Dec 13 2003
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EXTENSIONS
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Corrected by Jaap Spies (j.spies(AT)hccnet.nl), Jan 26 2004
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