A064970 - cp's OEIS frontend

A064970 a(1)=1; thereafter, values of n for which r(n)-r(n-1) and r(n-1)-r(n-2) have the same sign, where r(n) = A005132(n).

n	a(n)
1	1
2	2
3	3
4	6
5	7
6	18
7	19
8	23
9	33
10	34
11	38
12	66
13	67
14	77
15	101
16	102
17	110
18	111
19	113
20	114
21	115
22	119
23	120
24	129
25	133
26	134
27	136
28	172
29	173
30	185
31	189
32	190
33	192
34	193
35	196
36	224
37	225
38	235
39	287
40	288
41	306
42	307
43	339
44	340
45	352
46	367
47	405
48	406
49	420
50	452
51	453
52	465
53	466

[1, 2, 3, 6, 7, 18, 19, 23, 33, 34, 38, 66, 67, 77, 101, 102, 110, 111, 113, 114, 115, 119, 120, 129, 133, 134, 136, 172, 173, 185, 189, 190, 192, 193, 196, 224, 225, 235, 287, 288, 306, 307, 339, 340, 352, 367, 405, 406, 420, 452, 453, 465, 466]

cp's OEIS Frontend

A064970 a(1)=1; thereafter, values of n for which r(n)-r(n-1) and r(n-1)-r(n-2) have the same sign, where r(n) = A005132(n).

Table of values

List of values

n	a(n)
1	1
2	2
3	3
4	6
5	7
6	18
7	19
8	23
9	33
10	34
11	38
12	66
13	67
14	77
15	101
16	102
17	110
18	111
19	113
20	114
21	115
22	119
23	120
24	129
25	133
26	134
27	136
28	172
29	173
30	185
31	189
32	190
33	192
34	193
35	196
36	224
37	225
38	235
39	287
40	288
41	306
42	307
43	339
44	340
45	352
46	367
47	405
48	406
49	420
50	452
51	453
52	465
53	466

n	a(n)
1	1
2	2
3	3
4	6
5	7
6	18
7	19
8	23
9	33
10	34
11	38
12	66
13	67
14	77
15	101
16	102
17	110
18	111
19	113
20	114
21	115
22	119
23	120
24	129
25	133
26	134
27	136
28	172
29	173
30	185
31	189
32	190
33	192
34	193
35	196
36	224
37	225
38	235
39	287
40	288
41	306
42	307
43	339
44	340
45	352
46	367
47	405
48	406
49	420
50	452
51	453
52	465
53	466

n	a(n)
1	1
2	2
3	3
4	6
5	7
6	18
7	19
8	23
9	33
10	34
11	38
12	66
13	67
14	77
15	101
16	102
17	110
18	111
19	113
20	114
21	115
22	119
23	120
24	129
25	133
26	134
27	136
28	172
29	173
30	185
31	189
32	190
33	192
34	193
35	196
36	224
37	225
38	235
39	287
40	288
41	306
42	307
43	339
44	340
45	352
46	367
47	405
48	406
49	420
50	452
51	453
52	465
53	466