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A225995 Number of pairs of orthogonal (-3,5) vectors of length 8*n. 1

%I

%S 1120,96608512,5476370673664,284705020569600000,

%T 16898172507712428441600,995986456574626692094492672,

%U 59516704487206110046425062572032,3603385124651416948013919241525788672

%N Number of pairs of orthogonal (-3,5) vectors of length 8*n.

%C Row 9 of A225987.

%H R. H. Hardin, <a href="/A225995/b225995.txt">Table of n, a(n) for n = 1..67</a>

%e Some solutions for n=1

%e .-3..5...-3..5...-3..5....5..5...-3..5...-3..5...-3.-3...-3..5...-3..5....5..5

%e ..5..5....5.-3....5..5...-3..5...-3..5....5..5...-3.-3....5..5....5.-3...-3..5

%e ..5.-3....5.-3....5.-3....5..5....5..5....5..5...-3..5...-3..5....5.-3....5.-3

%e ..5..5...-3.-3....5..5...-3..5....5.-3....5.-3....5.-3...-3..5....5..5....5..5

%e .-3..5...-3.-3....5..5....5..5....5..5....5.-3...-3.-3....5..5...-3..5....5.-3

%e ..5.-3...-3.-3....5.-3...-3..5....5.-3....5..5...-3.-3....5..5....5..5....5..5

%e ..5.-3...-3.-3...-3..5...-3..5...-3..5....5.-3....5.-3...-3..5...-3..5....5.-3

%e ..5..5...-3.-3...-3..5....5.-3....5..5...-3..5...-3.-3....5.-3....5..5....5.-3

%K nonn

%O 1,1

%A _R. H. Hardin_, May 22 2013

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Last modified August 16 07:50 EDT 2022. Contains 356160 sequences. (Running on oeis4.)