A064000 - cp's OEIS frontend

A064000 Unitary untouchable numbers of second kind: numbers n such that usigma(x) = n has no solution, where usigma(x) (A034448) is the sum of unitary divisors of x.

n	a(n)
1	2
2	7
3	11
4	13
5	15
6	16
7	19
8	21
9	22
10	23
11	25
12	27
13	29
14	31
15	34
16	35
17	37
18	39
19	41
20	43
21	45
22	46
23	47
24	49
25	51
26	52
27	53
28	55
29	57
30	58
31	59
32	61
33	63
34	64
35	66
36	67
37	69
38	71
39	73
40	75
41	76
42	77
43	79
44	81
45	83
46	85
47	86
48	87
49	88
50	89
51	91
52	92
53	93
54	94
55	95
56	97
57	99
58	101
59	103
60	105
61	106
62	107
63	109
64	111
65	113
66	115
67	116

[2, 7, 11, 13, 15, 16, 19, 21, 22, 23, 25, 27, 29, 31, 34, 35, 37, 39, 41, 43, 45, 46, 47, 49, 51, 52, 53, 55, 57, 58, 59, 61, 63, 64, 66, 67, 69, 71, 73, 75, 76, 77, 79, 81, 83, 85, 86, 87, 88, 89, 91, 92, 93, 94, 95, 97, 99, 101, 103, 105, 106, 107, 109, 111, 113, 115, 116]

cp's OEIS Frontend

A064000 Unitary untouchable numbers of second kind: numbers n such that usigma(x) = n has no solution, where usigma(x) (A034448) is the sum of unitary divisors of x.

Table of values

List of values

n	a(n)
1	2
2	7
3	11
4	13
5	15
6	16
7	19
8	21
9	22
10	23
11	25
12	27
13	29
14	31
15	34
16	35
17	37
18	39
19	41
20	43
21	45
22	46
23	47
24	49
25	51
26	52
27	53
28	55
29	57
30	58
31	59
32	61
33	63
34	64
35	66
36	67
37	69
38	71
39	73
40	75
41	76
42	77
43	79
44	81
45	83
46	85
47	86
48	87
49	88
50	89
51	91
52	92
53	93
54	94
55	95
56	97
57	99
58	101
59	103
60	105
61	106
62	107
63	109
64	111
65	113
66	115
67	116

n	a(n)
1	2
2	7
3	11
4	13
5	15
6	16
7	19
8	21
9	22
10	23
11	25
12	27
13	29
14	31
15	34
16	35
17	37
18	39
19	41
20	43
21	45
22	46
23	47
24	49
25	51
26	52
27	53
28	55
29	57
30	58
31	59
32	61
33	63
34	64
35	66
36	67
37	69
38	71
39	73
40	75
41	76
42	77
43	79
44	81
45	83
46	85
47	86
48	87
49	88
50	89
51	91
52	92
53	93
54	94
55	95
56	97
57	99
58	101
59	103
60	105
61	106
62	107
63	109
64	111
65	113
66	115
67	116

n	a(n)
1	2
2	7
3	11
4	13
5	15
6	16
7	19
8	21
9	22
10	23
11	25
12	27
13	29
14	31
15	34
16	35
17	37
18	39
19	41
20	43
21	45
22	46
23	47
24	49
25	51
26	52
27	53
28	55
29	57
30	58
31	59
32	61
33	63
34	64
35	66
36	67
37	69
38	71
39	73
40	75
41	76
42	77
43	79
44	81
45	83
46	85
47	86
48	87
49	88
50	89
51	91
52	92
53	93
54	94
55	95
56	97
57	99
58	101
59	103
60	105
61	106
62	107
63	109
64	111
65	113
66	115
67	116