A211150 - cp's OEIS frontend

A211150 Number of 2 X 2 matrices having all terms in {-n,...,0,...,n} and determinant > n.

n	a(n)
1	4
2	104
3	608
4	1940
5	4916
6	10084
7	19052
8	32352
9	52084
10	79308
11	116900
12	164564
13	227860
14	306324
15	403868
16	522256
17	667488
18	837236
19	1041708
20	1277060
21	1553116
22	1871084
23	2238452
24	2648836
25	3121648
26	3652200
27	4248656
28	4911312
29	5656784

[4, 104, 608, 1940, 4916, 10084, 19052, 32352, 52084, 79308, 116900, 164564, 227860, 306324, 403868, 522256, 667488, 837236, 1041708, 1277060, 1553116, 1871084, 2238452, 2648836, 3121648, 3652200, 4248656, 4911312, 5656784]

cp's OEIS Frontend

A211150 Number of 2 X 2 matrices having all terms in {-n,...,0,...,n} and determinant > n.

Table of values

List of values