A189829 - cp's OEIS frontend

A189829 Record values of d(n-1) + d(n+1), where d(k) is the number of divisors of k.

n	a(n)
1	3
2	5
3	7
4	8
5	10
6	11
7	12
8	14
9	16
10	20
11	22
12	24
13	26
14	28
15	32
16	34
17	36
18	38
19	44
20	46
21	48
22	52
23	56
24	58
25	60
26	68
27	72
28	76
29	78
30	80
31	84
32	88
33	92
34	96
35	98
36	100
37	104
38	106
39	108
40	116
41	124
42	128
43	136
44	148
45	156
46	160
47	168
48	172
49	174
50	176
51	184
52	196
53	200
54	208
55	224
56	236
57	248
58	260
59	268

[3, 5, 7, 8, 10, 11, 12, 14, 16, 20, 22, 24, 26, 28, 32, 34, 36, 38, 44, 46, 48, 52, 56, 58, 60, 68, 72, 76, 78, 80, 84, 88, 92, 96, 98, 100, 104, 106, 108, 116, 124, 128, 136, 148, 156, 160, 168, 172, 174, 176, 184, 196, 200, 208, 224, 236, 248, 260, 268]

cp's OEIS Frontend

A189829 Record values of d(n-1) + d(n+1), where d(k) is the number of divisors of k.

Table of values

List of values

n	a(n)
1	3
2	5
3	7
4	8
5	10
6	11
7	12
8	14
9	16
10	20
11	22
12	24
13	26
14	28
15	32
16	34
17	36
18	38
19	44
20	46
21	48
22	52
23	56
24	58
25	60
26	68
27	72
28	76
29	78
30	80
31	84
32	88
33	92
34	96
35	98
36	100
37	104
38	106
39	108
40	116
41	124
42	128
43	136
44	148
45	156
46	160
47	168
48	172
49	174
50	176
51	184
52	196
53	200
54	208
55	224
56	236
57	248
58	260
59	268

n	a(n)
1	3
2	5
3	7
4	8
5	10
6	11
7	12
8	14
9	16
10	20
11	22
12	24
13	26
14	28
15	32
16	34
17	36
18	38
19	44
20	46
21	48
22	52
23	56
24	58
25	60
26	68
27	72
28	76
29	78
30	80
31	84
32	88
33	92
34	96
35	98
36	100
37	104
38	106
39	108
40	116
41	124
42	128
43	136
44	148
45	156
46	160
47	168
48	172
49	174
50	176
51	184
52	196
53	200
54	208
55	224
56	236
57	248
58	260
59	268

n	a(n)
1	3
2	5
3	7
4	8
5	10
6	11
7	12
8	14
9	16
10	20
11	22
12	24
13	26
14	28
15	32
16	34
17	36
18	38
19	44
20	46
21	48
22	52
23	56
24	58
25	60
26	68
27	72
28	76
29	78
30	80
31	84
32	88
33	92
34	96
35	98
36	100
37	104
38	106
39	108
40	116
41	124
42	128
43	136
44	148
45	156
46	160
47	168
48	172
49	174
50	176
51	184
52	196
53	200
54	208
55	224
56	236
57	248
58	260
59	268