

A210282


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


3



1, 3, 12, 21, 43, 45, 102, 75, 161, 156, 234, 163, 433, 221, 424, 460, 608, 359, 876, 447, 1049, 830, 942, 637, 1784, 932, 1304, 1306, 1905, 997, 2648, 1137, 2428, 1920, 2164, 2042, 3980, 1595, 2694, 2618, 4378, 1961, 4900, 2163, 4423, 4283
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OFFSET

0,2


COMMENTS

See A210000 for a guide to related sequences.


LINKS



MATHEMATICA

a = 0; b = n; z1 = 45;
t[n_] := t[n] = Flatten[Table[w*z  x*y, {w, a, b}, {x, a, b}, {y, a, b}, {z, a, b}]]
c[n_, k_] := c[n, k] = Count[t[n], k]
Table[c[n, n], {n, 0, z1}] (* A210282 *)


CROSSREFS



KEYWORD

nonn


AUTHOR



STATUS

approved



