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 A089472 Number of different values taken by the determinant of a real (0,1)-matrix of order n. 7
 2, 3, 5, 7, 11, 19, 43, 91, 227, 587 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Lower bounds: a(11) >= 1623, a(12) >= 4605, a(13) >= 14365, a(14) >= 44535, a(15) >= 145273, a(16) >= 476947 REFERENCES R. Craigen, The Range of the Determinant Function on the Set of n X n (0,1)-Matrices, J. Combin. Math. Combin. Computing, 8 (1990) pp. 161-171. LINKS W. P. Orrick, The maximal {-1, 1}-determinant of order 15. Gerhard R. Paseman, Partial Proof of the Determinant Spectrum for 7x7 0-1 Matrices. Miodrag Zivkovic, Massive computation as a problem solving tool, In Proceedings of the 10th Congress of Yugoslav Mathematicians (Belgrade, 2001), pages 113-128. Univ. Belgrade Fac. Math., Belgrade, 2001. M. Zivkovic, Classification of small (0,1) matrices, arXiv:math/0511636 [math.CO], 2005. EXAMPLE a(7)=43 because a 7X7 (0,1)-matrix A_7 can produce the values abs(det(A_7))= {0,1,...,17,18,20,24,32} CROSSREFS Cf. A003432 largest determinant of (0, 1)-matrix, A013588 smallest integer not representable as determinant of (0, 1)-matrix, A089478 occurrence counts, A087983 number of different values taken by permanent of (0, 1)-matrix. Sequence in context: A002231 A087769 A084736 * A079429 A262378 A072299 Adjacent sequences:  A089469 A089470 A089471 * A089473 A089474 A089475 KEYWORD hard,more,nonn AUTHOR Hugo Pfoertner, Nov 04 2003 EXTENSIONS a(1)..a(4) from Wouter Meeussen. a(7) verified by Gordon F. Royle. Extended by William Orrick, Jan 12 2006. a(8) and a(9) computed by Miodrag Zivkovic. a(8) independently confirmed by Antonis Charalambides. a(10) computed by William Orrick. Edited by Max Alekseyev, May 02 2011 STATUS approved

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Last modified August 18 22:17 EDT 2018. Contains 313840 sequences. (Running on oeis4.)