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A210027 Number of 2 X 2 matrices having all elements in {1,2,...,n} and determinant 5. 3
0, 0, 0, 3, 9, 23, 27, 47, 59, 79, 111, 147, 159, 203, 223, 291, 319, 379, 399, 467, 535, 579, 615, 699, 727, 883, 927, 995, 1039, 1147, 1215, 1331, 1391, 1467, 1527, 1739, 1783, 1923, 1991, 2083, 2223, 2379, 2423, 2587, 2663, 2875, 2959, 3139 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,4

COMMENTS

See A210000 for a guide to related sequences.

LINKS

Chai Wah Wu, Table of n, a(n) for n = 0..10000

MATHEMATICA

(See the Mathematica section at A209978.)

CROSSREFS

Cf. A210000.

Sequence in context: A272559 A270991 A029512 * A018555 A147271 A230119

Adjacent sequences:  A210024 A210025 A210026 * A210028 A210029 A210030

KEYWORD

nonn

AUTHOR

Clark Kimberling, Mar 16 2012

STATUS

approved

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Last modified April 20 18:45 EDT 2021. Contains 343137 sequences. (Running on oeis4.)