A366619 - cp's OEIS frontend

A366619 Group the natural numbers into blocks of size 2: [1,2], [3,4], ... and reverse the order of the numbers within each block. Then group into blocks of size 3 and reverse the order in each block.

n	a(n)
1	4
2	1
3	2
4	5
5	6
6	3
7	10
8	7
9	8
10	11
11	12
12	9
13	16
14	13
15	14
16	17
17	18
18	15
19	22
20	19
21	20
22	23
23	24
24	21
25	28
26	25
27	26
28	29
29	30
30	27
31	34
32	31
33	32
34	35
35	36
36	33
37	40
38	37
39	38
40	41
41	42
42	39
43	46
44	43
45	44
46	47
47	48
48	45
49	52
50	49
51	50
52	53
53	54
54	51
55	58
56	55
57	56
58	59
59	60
60	57
61	64
62	61
63	62
64	65
65	66
66	63
67	70
68	67
69	68
70	71
71	72
72	69

[4, 1, 2, 5, 6, 3, 10, 7, 8, 11, 12, 9, 16, 13, 14, 17, 18, 15, 22, 19, 20, 23, 24, 21, 28, 25, 26, 29, 30, 27, 34, 31, 32, 35, 36, 33, 40, 37, 38, 41, 42, 39, 46, 43, 44, 47, 48, 45, 52, 49, 50, 53, 54, 51, 58, 55, 56, 59, 60, 57, 64, 61, 62, 65, 66, 63, 70, 67, 68, 71, 72, 69]

cp's OEIS Frontend

A366619 Group the natural numbers into blocks of size 2: [1,2], [3,4], ... and reverse the order of the numbers within each block. Then group into blocks of size 3 and reverse the order in each block.

Table of values

List of values

n	a(n)
1	4
2	1
3	2
4	5
5	6
6	3
7	10
8	7
9	8
10	11
11	12
12	9
13	16
14	13
15	14
16	17
17	18
18	15
19	22
20	19
21	20
22	23
23	24
24	21
25	28
26	25
27	26
28	29
29	30
30	27
31	34
32	31
33	32
34	35
35	36
36	33
37	40
38	37
39	38
40	41
41	42
42	39
43	46
44	43
45	44
46	47
47	48
48	45
49	52
50	49
51	50
52	53
53	54
54	51
55	58
56	55
57	56
58	59
59	60
60	57
61	64
62	61
63	62
64	65
65	66
66	63
67	70
68	67
69	68
70	71
71	72
72	69

n	a(n)
1	4
2	1
3	2
4	5
5	6
6	3
7	10
8	7
9	8
10	11
11	12
12	9
13	16
14	13
15	14
16	17
17	18
18	15
19	22
20	19
21	20
22	23
23	24
24	21
25	28
26	25
27	26
28	29
29	30
30	27
31	34
32	31
33	32
34	35
35	36
36	33
37	40
38	37
39	38
40	41
41	42
42	39
43	46
44	43
45	44
46	47
47	48
48	45
49	52
50	49
51	50
52	53
53	54
54	51
55	58
56	55
57	56
58	59
59	60
60	57
61	64
62	61
63	62
64	65
65	66
66	63
67	70
68	67
69	68
70	71
71	72
72	69

n	a(n)
1	4
2	1
3	2
4	5
5	6
6	3
7	10
8	7
9	8
10	11
11	12
12	9
13	16
14	13
15	14
16	17
17	18
18	15
19	22
20	19
21	20
22	23
23	24
24	21
25	28
26	25
27	26
28	29
29	30
30	27
31	34
32	31
33	32
34	35
35	36
36	33
37	40
38	37
39	38
40	41
41	42
42	39
43	46
44	43
45	44
46	47
47	48
48	45
49	52
50	49
51	50
52	53
53	54
54	51
55	58
56	55
57	56
58	59
59	60
60	57
61	64
62	61
63	62
64	65
65	66
66	63
67	70
68	67
69	68
70	71
71	72
72	69