A211812 - cp's OEIS frontend

A211812 Number of 4-tuples (w,x,y,z) with all terms in {1,...,n} and wx<=3y*z.

n	a(n)
0	0
1	1
2	15
3	75
4	224
5	525
6	1077
7	1960
8	3299
9	5249
10	7939
11	11534
12	16285
13	22313
14	29890
15	39289
16	50713
17	64431
18	80854
19	100157
20	122747
21	148980
22	179165
23	213687
24	253113
25	297646
26	347806
27	404160
28	467027
29	536878
30	614464
31	700012
32	794247
33	897729

[0, 1, 15, 75, 224, 525, 1077, 1960, 3299, 5249, 7939, 11534, 16285, 22313, 29890, 39289, 50713, 64431, 80854, 100157, 122747, 148980, 179165, 213687, 253113, 297646, 347806, 404160, 467027, 536878, 614464, 700012, 794247, 897729]

cp's OEIS Frontend

A211812 Number of 4-tuples (w,x,y,z) with all terms in {1,...,n} and wx<=3y*z.

Table of values

List of values

cp's OEIS Frontend

A211812 Number of 4-tuples (w,x,y,z) with all terms in {1,...,n} and w*x<=3*y*z.

Table of values

List of values

A211812 Number of 4-tuples (w,x,y,z) with all terms in {1,...,n} and wx<=3y*z.