A259227 - cp's OEIS frontend

A259227 Hydropronic numbers: numbers n that can be written as a product of 2 integers whose sum is equal to ceiling(n/ceiling(sqrt(n))) + ceiling(sqrt(n)).

n	a(n)
1	1
2	2
3	3
4	4
5	6
6	8
7	9
8	10
9	12
10	15
11	16
12	18
13	20
14	21
15	24
16	25
17	28
18	30
19	32
20	35
21	36
22	40
23	42
24	45
25	48
26	49
27	50
28	54
29	56
30	60
31	63
32	64
33	66
34	70
35	72
36	77
37	80
38	81
39	84
40	88
41	90
42	91
43	96
44	99
45	100
46	104
47	108
48	110
49	112
50	117
51	120
52	121
53	126
54	130
55	132
56	135
57	140
58	143
59	144
60	150
61	154
62	156
63	160

[1, 2, 3, 4, 6, 8, 9, 10, 12, 15, 16, 18, 20, 21, 24, 25, 28, 30, 32, 35, 36, 40, 42, 45, 48, 49, 50, 54, 56, 60, 63, 64, 66, 70, 72, 77, 80, 81, 84, 88, 90, 91, 96, 99, 100, 104, 108, 110, 112, 117, 120, 121, 126, 130, 132, 135, 140, 143, 144, 150, 154, 156, 160]

cp's OEIS Frontend

A259227 Hydropronic numbers: numbers n that can be written as a product of 2 integers whose sum is equal to ceiling(n/ceiling(sqrt(n))) + ceiling(sqrt(n)).

Table of values

List of values

n	a(n)
1	1
2	2
3	3
4	4
5	6
6	8
7	9
8	10
9	12
10	15
11	16
12	18
13	20
14	21
15	24
16	25
17	28
18	30
19	32
20	35
21	36
22	40
23	42
24	45
25	48
26	49
27	50
28	54
29	56
30	60
31	63
32	64
33	66
34	70
35	72
36	77
37	80
38	81
39	84
40	88
41	90
42	91
43	96
44	99
45	100
46	104
47	108
48	110
49	112
50	117
51	120
52	121
53	126
54	130
55	132
56	135
57	140
58	143
59	144
60	150
61	154
62	156
63	160

n	a(n)
1	1
2	2
3	3
4	4
5	6
6	8
7	9
8	10
9	12
10	15
11	16
12	18
13	20
14	21
15	24
16	25
17	28
18	30
19	32
20	35
21	36
22	40
23	42
24	45
25	48
26	49
27	50
28	54
29	56
30	60
31	63
32	64
33	66
34	70
35	72
36	77
37	80
38	81
39	84
40	88
41	90
42	91
43	96
44	99
45	100
46	104
47	108
48	110
49	112
50	117
51	120
52	121
53	126
54	130
55	132
56	135
57	140
58	143
59	144
60	150
61	154
62	156
63	160

n	a(n)
1	1
2	2
3	3
4	4
5	6
6	8
7	9
8	10
9	12
10	15
11	16
12	18
13	20
14	21
15	24
16	25
17	28
18	30
19	32
20	35
21	36
22	40
23	42
24	45
25	48
26	49
27	50
28	54
29	56
30	60
31	63
32	64
33	66
34	70
35	72
36	77
37	80
38	81
39	84
40	88
41	90
42	91
43	96
44	99
45	100
46	104
47	108
48	110
49	112
50	117
51	120
52	121
53	126
54	130
55	132
56	135
57	140
58	143
59	144
60	150
61	154
62	156
63	160