A249990 - cp's OEIS frontend

A249990 Start with the natural numbers, reverse the order in each pair, skip one pair, reverse the order in each triple, skip one triple, and so on.

n	a(n)
1	2
2	1
3	6
4	3
5	4
6	12
7	5
8	8
9	7
10	16
11	9
12	10
13	13
14	14
15	22
16	15
17	18
18	11
19	24
20	17
21	32
22	25
23	26
24	19
25	20
26	23
27	30
28	48
29	31
30	38
31	21
32	28
33	27
34	34
35	33
36	52
37	35
38	42
39	29
40	36
41	39
42	40
43	49
44	50
45	58
46	51
47	54
48	41
49	44
50	37
51	60
52	43
53	66
54	53
55	84
56	67
57	68
58	61
59	62
60	45
61	46
62	55
63	56
64	59
65	76
66	94
67	77
68	90

[2, 1, 6, 3, 4, 12, 5, 8, 7, 16, 9, 10, 13, 14, 22, 15, 18, 11, 24, 17, 32, 25, 26, 19, 20, 23, 30, 48, 31, 38, 21, 28, 27, 34, 33, 52, 35, 42, 29, 36, 39, 40, 49, 50, 58, 51, 54, 41, 44, 37, 60, 43, 66, 53, 84, 67, 68, 61, 62, 45, 46, 55, 56, 59, 76, 94, 77, 90]

cp's OEIS Frontend

A249990 Start with the natural numbers, reverse the order in each pair, skip one pair, reverse the order in each triple, skip one triple, and so on.

Table of values

List of values

n	a(n)
1	2
2	1
3	6
4	3
5	4
6	12
7	5
8	8
9	7
10	16
11	9
12	10
13	13
14	14
15	22
16	15
17	18
18	11
19	24
20	17
21	32
22	25
23	26
24	19
25	20
26	23
27	30
28	48
29	31
30	38
31	21
32	28
33	27
34	34
35	33
36	52
37	35
38	42
39	29
40	36
41	39
42	40
43	49
44	50
45	58
46	51
47	54
48	41
49	44
50	37
51	60
52	43
53	66
54	53
55	84
56	67
57	68
58	61
59	62
60	45
61	46
62	55
63	56
64	59
65	76
66	94
67	77
68	90

n	a(n)
1	2
2	1
3	6
4	3
5	4
6	12
7	5
8	8
9	7
10	16
11	9
12	10
13	13
14	14
15	22
16	15
17	18
18	11
19	24
20	17
21	32
22	25
23	26
24	19
25	20
26	23
27	30
28	48
29	31
30	38
31	21
32	28
33	27
34	34
35	33
36	52
37	35
38	42
39	29
40	36
41	39
42	40
43	49
44	50
45	58
46	51
47	54
48	41
49	44
50	37
51	60
52	43
53	66
54	53
55	84
56	67
57	68
58	61
59	62
60	45
61	46
62	55
63	56
64	59
65	76
66	94
67	77
68	90

n	a(n)
1	2
2	1
3	6
4	3
5	4
6	12
7	5
8	8
9	7
10	16
11	9
12	10
13	13
14	14
15	22
16	15
17	18
18	11
19	24
20	17
21	32
22	25
23	26
24	19
25	20
26	23
27	30
28	48
29	31
30	38
31	21
32	28
33	27
34	34
35	33
36	52
37	35
38	42
39	29
40	36
41	39
42	40
43	49
44	50
45	58
46	51
47	54
48	41
49	44
50	37
51	60
52	43
53	66
54	53
55	84
56	67
57	68
58	61
59	62
60	45
61	46
62	55
63	56
64	59
65	76
66	94
67	77
68	90