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A054407
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Number of asymmetric n X n binary matrices under action of dihedral group of the square D_4.
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5
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0, 0, 0, 36, 7860, 4177152, 8589313152, 70368605798400, 2305842990423490560, 302231454885790246502400, 158456325028519245775644917760, 332306998946228931044233275859009536, 2787593149816327892614636032925171439370240
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OFFSET
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0,4
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LINKS
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FORMULA
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(1/8)*(2^(n^2)-2*2^((n^2+n)/2)-3*2^(n^2/2)+2*2^(n^2/4)+2*2^((n^2+2*n)/4)) if n is even and (1/8)*(2^(n^2)-4*2^((n^2+n)/2)-2^((n^2+1)/2)+4*2^((n^2+2*n+1)/4)) if n is odd. - Corrected by Colin Barker, Oct 25 2016
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CROSSREFS
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KEYWORD
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easy,nonn
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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