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A185177
Different values of the permanent in (0,1) quadratic matrices with exactly 3 ones in each row and each column, in the increasing order.
4
6, 9, 12, 13, 17, 18, 20, 24, 25, 26, 27, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42
OFFSET
1,1
COMMENTS
The sequence contains all different terms of A185179 in increasing order.
REFERENCES
V. I. Bolshakov, On spectrum of permanent on Lambda_n^k, Proc. of Seminar on Discrete Math. and Appl., Moscow State Univ. (1986), 65-73 (in Russian).
LINKS
V. S. Shevelev, Some problems of the theory of enumerating the permutations with restricted position, Journal of Soviet Mathematics, 61 (4) (1992) 2272-2317 (see pp.2307-2309).
CROSSREFS
KEYWORD
nonn,more
AUTHOR
Vladimir Shevelev, Feb 19 2011
STATUS
approved