A091626 - cp's OEIS frontend

A091626 Number of ordered integer pairs (b,c) with 0 <= b, c <= n such that both roots of x^2+bx+c=0 are integers.

n	a(n)
0	1
1	2
2	4
3	6
4	9
5	11
6	14
7	16
8	19
9	22
10	25
11	27
12	31
13	33
14	36
15	39
16	43
17	45
18	49
19	51
20	55
21	58
22	61
23	63
24	68
25	71
26	74
27	77
28	81
29	83
30	88
31	90
32	94
33	97
34	100
35	103
36	109
37	111
38	114
39	117
40	122
41	124
42	129
43	131
44	135
45	139
46	142
47	144
48	150
49	153
50	157
51	160
52	164
53	166
54	171
55	174
56	179
57	182
58	185
59	187

[1, 2, 4, 6, 9, 11, 14, 16, 19, 22, 25, 27, 31, 33, 36, 39, 43, 45, 49, 51, 55, 58, 61, 63, 68, 71, 74, 77, 81, 83, 88, 90, 94, 97, 100, 103, 109, 111, 114, 117, 122, 124, 129, 131, 135, 139, 142, 144, 150, 153, 157, 160, 164, 166, 171, 174, 179, 182, 185, 187]

cp's OEIS Frontend

A091626 Number of ordered integer pairs (b,c) with 0 <= b, c <= n such that both roots of x^2+bx+c=0 are integers.

Table of values

List of values

n	a(n)
0	1
1	2
2	4
3	6
4	9
5	11
6	14
7	16
8	19
9	22
10	25
11	27
12	31
13	33
14	36
15	39
16	43
17	45
18	49
19	51
20	55
21	58
22	61
23	63
24	68
25	71
26	74
27	77
28	81
29	83
30	88
31	90
32	94
33	97
34	100
35	103
36	109
37	111
38	114
39	117
40	122
41	124
42	129
43	131
44	135
45	139
46	142
47	144
48	150
49	153
50	157
51	160
52	164
53	166
54	171
55	174
56	179
57	182
58	185
59	187

n	a(n)
0	1
1	2
2	4
3	6
4	9
5	11
6	14
7	16
8	19
9	22
10	25
11	27
12	31
13	33
14	36
15	39
16	43
17	45
18	49
19	51
20	55
21	58
22	61
23	63
24	68
25	71
26	74
27	77
28	81
29	83
30	88
31	90
32	94
33	97
34	100
35	103
36	109
37	111
38	114
39	117
40	122
41	124
42	129
43	131
44	135
45	139
46	142
47	144
48	150
49	153
50	157
51	160
52	164
53	166
54	171
55	174
56	179
57	182
58	185
59	187

n	a(n)
0	1
1	2
2	4
3	6
4	9
5	11
6	14
7	16
8	19
9	22
10	25
11	27
12	31
13	33
14	36
15	39
16	43
17	45
18	49
19	51
20	55
21	58
22	61
23	63
24	68
25	71
26	74
27	77
28	81
29	83
30	88
31	90
32	94
33	97
34	100
35	103
36	109
37	111
38	114
39	117
40	122
41	124
42	129
43	131
44	135
45	139
46	142
47	144
48	150
49	153
50	157
51	160
52	164
53	166
54	171
55	174
56	179
57	182
58	185
59	187