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A209988 Number of 2 X 2 matrices having all elements in {-n,...n} and determinant 4. 4
0, 0, 52, 116, 364, 492, 684, 876, 1260, 1452, 1836, 2156, 2668, 3052, 3628, 3884, 4652, 5164, 5740, 6316, 7340, 7724, 8684, 9388, 10156, 10796, 11948, 12524, 14060, 14956, 15724, 16684, 18220, 18860, 20396, 21164, 22700, 23852, 25580 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,3
COMMENTS
See A210000 for a guide to related sequences.
LINKS
MATHEMATICA
(See the Mathematica section at A209981.)
CROSSREFS
Cf. A210000.
Sequence in context: A252336 A044239 A044620 * A326912 A327147 A346898
KEYWORD
nonn
AUTHOR
Clark Kimberling, Mar 17 2012
STATUS
approved

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Last modified September 11 11:17 EDT 2024. Contains 375827 sequences. (Running on oeis4.)