A209976 Number of 2 X 2 matrices having all elements in {0,1,...,n} and determinant 4.

0, 0, 5, 11, 43, 59, 83, 107, 155, 179, 227, 267, 331, 379, 451, 483, 579, 643, 715, 787, 915, 963, 1083, 1171, 1267, 1347, 1491, 1563, 1755, 1867, 1963, 2083, 2275, 2355, 2547, 2643, 2835, 2979, 3195, 3291, 3483, 3643, 3787, 3955, 4275, 4371

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 A210000.)

Crossrefs

Cf. A210000.

Sequence in context: A055113 A260268 A129015 * A141355 A262020 A222368

Adjacent sequences: A209973 A209974 A209975 * A209977 A209978 A209979

Keyword

nonn

Author

Clark Kimberling, Mar 16 2012

Status

approved