A212108 - cp's OEIS frontend

A212108 Number of (w,x,y,z) with all terms in {1,...,n} and wx-yz

n	a(n)
0	0
1	1
2	13
3	62
4	187
5	444
6	885
7	1616
8	2677
9	4227
10	6326
11	9163
12	12742
13	17468
14	23167
15	30278
16	38876
17	49268
18	61315
19	75858
20	92363
21	111867
22	134039
23	159426
24	187841
25	220810
26	257093
27	297936
28	343312
29	394178
30	449481
31	511840
32	578961
33	653514
34	734486

[0, 1, 13, 62, 187, 444, 885, 1616, 2677, 4227, 6326, 9163, 12742, 17468, 23167, 30278, 38876, 49268, 61315, 75858, 92363, 111867, 134039, 159426, 187841, 220810, 257093, 297936, 343312, 394178, 449481, 511840, 578961, 653514, 734486]

cp's OEIS Frontend

A212108 Number of (w,x,y,z) with all terms in {1,...,n} and wx-yz

Table of values

List of values

cp's OEIS Frontend

A212108 Number of (w,x,y,z) with all terms in {1,...,n} and w*x-y*z

Table of values

List of values

A212108 Number of (w,x,y,z) with all terms in {1,...,n} and wx-yz