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A210027 Number of 2 X 2 matrices having all elements in {1,2,...,n} and determinant 5. 3

%I

%S 0,0,0,3,9,23,27,47,59,79,111,147,159,203,223,291,319,379,399,467,535,

%T 579,615,699,727,883,927,995,1039,1147,1215,1331,1391,1467,1527,1739,

%U 1783,1923,1991,2083,2223,2379,2423,2587,2663,2875,2959,3139

%N Number of 2 X 2 matrices having all elements in {1,2,...,n} and determinant 5.

%C See A210000 for a guide to related sequences.

%H Chai Wah Wu, <a href="/A210027/b210027.txt">Table of n, a(n) for n = 0..10000</a>

%t (See the Mathematica section at A209978.)

%Y Cf. A210000.

%K nonn

%O 0,4

%A _Clark Kimberling_, Mar 16 2012

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Last modified February 3 17:00 EST 2023. Contains 360044 sequences. (Running on oeis4.)