A026252 - cp's OEIS frontend

A026252 a(n) = (1/2)*(s(n) + 1), where s(n) is the n-th odd number in A026250. Also a(n) = position of n in A026252.

n	a(n)
1	2
2	1
3	7
4	9
5	12
6	14
7	3
8	19
9	4
10	24
11	26
12	5
13	31
14	6
15	36
16	38
17	41
18	43
19	8
20	48
21	50
22	53
23	55
24	10
25	60
26	11
27	65
28	67
29	70
30	72
31	13
32	77
33	79
34	82
35	84
36	15
37	89
38	16
39	94
40	96
41	17
42	101
43	18
44	106
45	108
46	111
47	113
48	20
49	118
50	21
51	123
52	125
53	22
54	130
55	23
56	135
57	137
58	140
59	142

[2, 1, 7, 9, 12, 14, 3, 19, 4, 24, 26, 5, 31, 6, 36, 38, 41, 43, 8, 48, 50, 53, 55, 10, 60, 11, 65, 67, 70, 72, 13, 77, 79, 82, 84, 15, 89, 16, 94, 96, 17, 101, 18, 106, 108, 111, 113, 20, 118, 21, 123, 125, 22, 130, 23, 135, 137, 140, 142]

cp's OEIS Frontend

A026252 a(n) = (1/2)*(s(n) + 1), where s(n) is the n-th odd number in A026250. Also a(n) = position of n in A026252.

Table of values

List of values

n	a(n)
1	2
2	1
3	7
4	9
5	12
6	14
7	3
8	19
9	4
10	24
11	26
12	5
13	31
14	6
15	36
16	38
17	41
18	43
19	8
20	48
21	50
22	53
23	55
24	10
25	60
26	11
27	65
28	67
29	70
30	72
31	13
32	77
33	79
34	82
35	84
36	15
37	89
38	16
39	94
40	96
41	17
42	101
43	18
44	106
45	108
46	111
47	113
48	20
49	118
50	21
51	123
52	125
53	22
54	130
55	23
56	135
57	137
58	140
59	142

n	a(n)
1	2
2	1
3	7
4	9
5	12
6	14
7	3
8	19
9	4
10	24
11	26
12	5
13	31
14	6
15	36
16	38
17	41
18	43
19	8
20	48
21	50
22	53
23	55
24	10
25	60
26	11
27	65
28	67
29	70
30	72
31	13
32	77
33	79
34	82
35	84
36	15
37	89
38	16
39	94
40	96
41	17
42	101
43	18
44	106
45	108
46	111
47	113
48	20
49	118
50	21
51	123
52	125
53	22
54	130
55	23
56	135
57	137
58	140
59	142

n	a(n)
1	2
2	1
3	7
4	9
5	12
6	14
7	3
8	19
9	4
10	24
11	26
12	5
13	31
14	6
15	36
16	38
17	41
18	43
19	8
20	48
21	50
22	53
23	55
24	10
25	60
26	11
27	65
28	67
29	70
30	72
31	13
32	77
33	79
34	82
35	84
36	15
37	89
38	16
39	94
40	96
41	17
42	101
43	18
44	106
45	108
46	111
47	113
48	20
49	118
50	21
51	123
52	125
53	22
54	130
55	23
56	135
57	137
58	140
59	142