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

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

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