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A209986 Number of 2 X 2 matrices having all elements in {-n,...n} and determinant 3. 4
0, 0, 24, 176, 240, 368, 528, 720, 848, 1232, 1360, 1680, 2000, 2384, 2576, 3216, 3472, 3984, 4368, 4944, 5200, 6160, 6480, 7184, 7824, 8464, 8848, 10000, 10384, 11280, 11920, 12880, 13392, 14992, 15504, 16272, 17040, 18192, 18768, 20688 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

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 A209981.)

CROSSREFS

Cf. A210000.

Sequence in context: A268623 A209716 A209709 * A297522 A165187 A052761

Adjacent sequences: A209983 A209984 A209985 * A209987 A209988 A209989

KEYWORD

nonn

AUTHOR

Clark Kimberling, Mar 17 2012

STATUS

approved

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Last modified February 5 12:17 EST 2023. Contains 360084 sequences. (Running on oeis4.)