A211513 - cp's OEIS frontend

A211513 Number of ordered triples (w,x,y) with all terms in {1,...,n} and 2w^2=xy.

n	a(n)
0	0
1	0
2	2
3	2
4	4
5	4
6	6
7	6
8	10
9	14
10	16
11	16
12	18
13	18
14	20
15	20
16	24
17	24
18	32
19	32
20	34
21	34
22	36
23	36
24	40
25	46
26	48
27	52
28	54
29	54
30	56
31	56
32	66
33	66
34	68
35	68
36	76
37	76
38	78
39	78
40	82
41	82
42	84
43	84
44	86
45	90
46	92
47	92
48	96
49	104
50	118
51	118
52	120
53	120
54	128
55	128
56	132
57	132
58	134
59	134
60	136
61	136
62	138
63	142

[0, 0, 2, 2, 4, 4, 6, 6, 10, 14, 16, 16, 18, 18, 20, 20, 24, 24, 32, 32, 34, 34, 36, 36, 40, 46, 48, 52, 54, 54, 56, 56, 66, 66, 68, 68, 76, 76, 78, 78, 82, 82, 84, 84, 86, 90, 92, 92, 96, 104, 118, 118, 120, 120, 128, 128, 132, 132, 134, 134, 136, 136, 138, 142]

cp's OEIS Frontend

A211513 Number of ordered triples (w,x,y) with all terms in {1,...,n} and 2w^2=xy.

Table of values

List of values

n	a(n)
0	0
1	0
2	2
3	2
4	4
5	4
6	6
7	6
8	10
9	14
10	16
11	16
12	18
13	18
14	20
15	20
16	24
17	24
18	32
19	32
20	34
21	34
22	36
23	36
24	40
25	46
26	48
27	52
28	54
29	54
30	56
31	56
32	66
33	66
34	68
35	68
36	76
37	76
38	78
39	78
40	82
41	82
42	84
43	84
44	86
45	90
46	92
47	92
48	96
49	104
50	118
51	118
52	120
53	120
54	128
55	128
56	132
57	132
58	134
59	134
60	136
61	136
62	138
63	142

n	a(n)
0	0
1	0
2	2
3	2
4	4
5	4
6	6
7	6
8	10
9	14
10	16
11	16
12	18
13	18
14	20
15	20
16	24
17	24
18	32
19	32
20	34
21	34
22	36
23	36
24	40
25	46
26	48
27	52
28	54
29	54
30	56
31	56
32	66
33	66
34	68
35	68
36	76
37	76
38	78
39	78
40	82
41	82
42	84
43	84
44	86
45	90
46	92
47	92
48	96
49	104
50	118
51	118
52	120
53	120
54	128
55	128
56	132
57	132
58	134
59	134
60	136
61	136
62	138
63	142

cp's OEIS Frontend

A211513 Number of ordered triples (w,x,y) with all terms in {1,...,n} and 2*w^2=x*y.

Table of values

List of values

A211513 Number of ordered triples (w,x,y) with all terms in {1,...,n} and 2w^2=xy.

n	a(n)
0	0
1	0
2	2
3	2
4	4
5	4
6	6
7	6
8	10
9	14
10	16
11	16
12	18
13	18
14	20
15	20
16	24
17	24
18	32
19	32
20	34
21	34
22	36
23	36
24	40
25	46
26	48
27	52
28	54
29	54
30	56
31	56
32	66
33	66
34	68
35	68
36	76
37	76
38	78
39	78
40	82
41	82
42	84
43	84
44	86
45	90
46	92
47	92
48	96
49	104
50	118
51	118
52	120
53	120
54	128
55	128
56	132
57	132
58	134
59	134
60	136
61	136
62	138
63	142