A005100 - cp's OEIS frontend

A005100 Deficient numbers: numbers k such that sigma(k) < 2k.

n	a(n)
1	1
2	2
3	3
4	4
5	5
6	7
7	8
8	9
9	10
10	11
11	13
12	14
13	15
14	16
15	17
16	19
17	21
18	22
19	23
20	25
21	26
22	27
23	29
24	31
25	32
26	33
27	34
28	35
29	37
30	38
31	39
32	41
33	43
34	44
35	45
36	46
37	47
38	49
39	50
40	51
41	52
42	53
43	55
44	57
45	58
46	59
47	61
48	62
49	63
50	64
51	65
52	67
53	68
54	69
55	71
56	73
57	74
58	75
59	76
60	77
61	79
62	81
63	82
64	83
65	85
66	86

[1, 2, 3, 4, 5, 7, 8, 9, 10, 11, 13, 14, 15, 16, 17, 19, 21, 22, 23, 25, 26, 27, 29, 31, 32, 33, 34, 35, 37, 38, 39, 41, 43, 44, 45, 46, 47, 49, 50, 51, 52, 53, 55, 57, 58, 59, 61, 62, 63, 64, 65, 67, 68, 69, 71, 73, 74, 75, 76, 77, 79, 81, 82, 83, 85, 86]

cp's OEIS Frontend

A005100 Deficient numbers: numbers k such that sigma(k) < 2k.

Table of values

List of values

n	a(n)
1	1
2	2
3	3
4	4
5	5
6	7
7	8
8	9
9	10
10	11
11	13
12	14
13	15
14	16
15	17
16	19
17	21
18	22
19	23
20	25
21	26
22	27
23	29
24	31
25	32
26	33
27	34
28	35
29	37
30	38
31	39
32	41
33	43
34	44
35	45
36	46
37	47
38	49
39	50
40	51
41	52
42	53
43	55
44	57
45	58
46	59
47	61
48	62
49	63
50	64
51	65
52	67
53	68
54	69
55	71
56	73
57	74
58	75
59	76
60	77
61	79
62	81
63	82
64	83
65	85
66	86

n	a(n)
1	1
2	2
3	3
4	4
5	5
6	7
7	8
8	9
9	10
10	11
11	13
12	14
13	15
14	16
15	17
16	19
17	21
18	22
19	23
20	25
21	26
22	27
23	29
24	31
25	32
26	33
27	34
28	35
29	37
30	38
31	39
32	41
33	43
34	44
35	45
36	46
37	47
38	49
39	50
40	51
41	52
42	53
43	55
44	57
45	58
46	59
47	61
48	62
49	63
50	64
51	65
52	67
53	68
54	69
55	71
56	73
57	74
58	75
59	76
60	77
61	79
62	81
63	82
64	83
65	85
66	86

n	a(n)
1	1
2	2
3	3
4	4
5	5
6	7
7	8
8	9
9	10
10	11
11	13
12	14
13	15
14	16
15	17
16	19
17	21
18	22
19	23
20	25
21	26
22	27
23	29
24	31
25	32
26	33
27	34
28	35
29	37
30	38
31	39
32	41
33	43
34	44
35	45
36	46
37	47
38	49
39	50
40	51
41	52
42	53
43	55
44	57
45	58
46	59
47	61
48	62
49	63
50	64
51	65
52	67
53	68
54	69
55	71
56	73
57	74
58	75
59	76
60	77
61	79
62	81
63	82
64	83
65	85
66	86