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A086264 Number of real {0,1} n X n matrices having determinant=1. 3
1, 3, 84, 10020, 4851360, 9240051240 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..6.

Hugo Pfoertner, Determinants of (0,1)-matrices. FORTRAN program.

Eric Weisstein's World of Mathematics, (0,1)-Matrix. Section in World of Mathematics.

Index entries for sequences related to binary matrices

MATHEMATICA

a[n_] := Module[{M, iter, cnt = 0}, M = Table[a[i, j], {i, 1, n}, {j, 1, n}]; iter = Thread[{Flatten[M], 0, 1}]; Do[If[Det[M] == 1, cnt++], Evaluate[Sequence @@ iter]]; cnt];

Do[Print[n, " ", a[n]], {n, 1, 4}] (* Jean-Fran├žois Alcover, Dec 09 2018 *)

CROSSREFS

Cf. A003024, A003432, A051752, A055165.

Cf. A046747.

Sequence in context: A261008 A217524 A203453 * A160878 A152791 A179431

Adjacent sequences:  A086261 A086262 A086263 * A086265 A086266 A086267

KEYWORD

more,nonn

AUTHOR

Hugo Pfoertner, Oct 05 2003

STATUS

approved

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Last modified January 16 21:37 EST 2019. Contains 319206 sequences. (Running on oeis4.)