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 A209973 Number of 2 X 2 matrices having all elements in {0,1,...,n} and determinant 2. 4
 0, 0, 12, 20, 36, 52, 76, 100, 132, 156, 204, 244, 276, 324, 396, 428, 492, 556, 628, 700, 764, 812, 932, 1020, 1084, 1164, 1308, 1380, 1476, 1588, 1684, 1804, 1932, 2012, 2204, 2300, 2396, 2540, 2756, 2852, 2980, 3140, 3284, 3452, 3612, 3708 (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 FORMULA a(n) = A197168(n) + 4*n + 2 for n >= 2. - Chai Wah Wu, Nov 28 2016 MATHEMATICA (See the Mathematica section at A210000.) CROSSREFS Cf. A210000. Sequence in context: A187766 A260905 A211415 * A282754 A063690 A229355 Adjacent sequences:  A209970 A209971 A209972 * A209974 A209975 A209976 KEYWORD nonn AUTHOR Clark Kimberling, Mar 16 2012 STATUS approved

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Last modified August 5 08:48 EDT 2021. Contains 346464 sequences. (Running on oeis4.)