A260577 - cp's OEIS frontend

A260577 Numbers n for which d(n+d(n)) < d(n), where d(n) is the number of divisors of n.

n	a(n)
1	4
2	15
3	16
4	20
5	21
6	24
7	27
8	28
9	30
10	32
11	33
12	36
13	39
14	42
15	45
16	48
17	52
18	54
19	55
20	56
21	57
22	63
23	64
24	66
25	68
26	69
27	75
28	76
29	78
30	81
31	85
32	90
33	93
34	100
35	105
36	110
37	112
38	114
39	116
40	117
41	120
42	123
43	126
44	133
45	135
46	138
47	140
48	144
49	145
50	150
51	153
52	159
53	160
54	162
55	165
56	168
57	170
58	171
59	172

[4, 15, 16, 20, 21, 24, 27, 28, 30, 32, 33, 36, 39, 42, 45, 48, 52, 54, 55, 56, 57, 63, 64, 66, 68, 69, 75, 76, 78, 81, 85, 90, 93, 100, 105, 110, 112, 114, 116, 117, 120, 123, 126, 133, 135, 138, 140, 144, 145, 150, 153, 159, 160, 162, 165, 168, 170, 171, 172]

cp's OEIS Frontend

A260577 Numbers n for which d(n+d(n)) < d(n), where d(n) is the number of divisors of n.

Table of values

List of values

n	a(n)
1	4
2	15
3	16
4	20
5	21
6	24
7	27
8	28
9	30
10	32
11	33
12	36
13	39
14	42
15	45
16	48
17	52
18	54
19	55
20	56
21	57
22	63
23	64
24	66
25	68
26	69
27	75
28	76
29	78
30	81
31	85
32	90
33	93
34	100
35	105
36	110
37	112
38	114
39	116
40	117
41	120
42	123
43	126
44	133
45	135
46	138
47	140
48	144
49	145
50	150
51	153
52	159
53	160
54	162
55	165
56	168
57	170
58	171
59	172

n	a(n)
1	4
2	15
3	16
4	20
5	21
6	24
7	27
8	28
9	30
10	32
11	33
12	36
13	39
14	42
15	45
16	48
17	52
18	54
19	55
20	56
21	57
22	63
23	64
24	66
25	68
26	69
27	75
28	76
29	78
30	81
31	85
32	90
33	93
34	100
35	105
36	110
37	112
38	114
39	116
40	117
41	120
42	123
43	126
44	133
45	135
46	138
47	140
48	144
49	145
50	150
51	153
52	159
53	160
54	162
55	165
56	168
57	170
58	171
59	172

n	a(n)
1	4
2	15
3	16
4	20
5	21
6	24
7	27
8	28
9	30
10	32
11	33
12	36
13	39
14	42
15	45
16	48
17	52
18	54
19	55
20	56
21	57
22	63
23	64
24	66
25	68
26	69
27	75
28	76
29	78
30	81
31	85
32	90
33	93
34	100
35	105
36	110
37	112
38	114
39	116
40	117
41	120
42	123
43	126
44	133
45	135
46	138
47	140
48	144
49	145
50	150
51	153
52	159
53	160
54	162
55	165
56	168
57	170
58	171
59	172