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Number of 2 X 2 matrices having all elements in {0,1,...,n} and determinant 4.
2

%I #10 Nov 22 2016 02:38:07

%S 0,0,5,11,43,59,83,107,155,179,227,267,331,379,451,483,579,643,715,

%T 787,915,963,1083,1171,1267,1347,1491,1563,1755,1867,1963,2083,2275,

%U 2355,2547,2643,2835,2979,3195,3291,3483,3643,3787,3955,4275,4371

%N Number of 2 X 2 matrices having all elements in {0,1,...,n} and determinant 4.

%C See A210000 for a guide to related sequences.

%H Chai Wah Wu, <a href="/A209976/b209976.txt">Table of n, a(n) for n = 0..10000</a>

%t (See the Mathematica section at A210000.)

%Y Cf. A210000.

%K nonn

%O 0,3

%A _Clark Kimberling_, Mar 16 2012