A026253 - cp's OEIS frontend

A026253 a(n) = (1/2)*s(n), where s(n) is the n-th even number in A026250. Also a(n) = position of n in A026253.

n	a(n)
1	3
2	5
3	1
4	10
5	2
6	15
7	17
8	20
9	22
10	4
11	27
12	29
13	32
14	34
15	6
16	39
17	7
18	44
19	46
20	8
21	51
22	9
23	56
24	58
25	61
26	63
27	11
28	68
29	12
30	73
31	75
32	13
33	80
34	14
35	85
36	87
37	90
38	92
39	16
40	97
41	99
42	102
43	104
44	18
45	109
46	19
47	114
48	116
49	119
50	121
51	21
52	126
53	128
54	131
55	133
56	23
57	138
58	24
59	143
60	145

[3, 5, 1, 10, 2, 15, 17, 20, 22, 4, 27, 29, 32, 34, 6, 39, 7, 44, 46, 8, 51, 9, 56, 58, 61, 63, 11, 68, 12, 73, 75, 13, 80, 14, 85, 87, 90, 92, 16, 97, 99, 102, 104, 18, 109, 19, 114, 116, 119, 121, 21, 126, 128, 131, 133, 23, 138, 24, 143, 145]

cp's OEIS Frontend

A026253 a(n) = (1/2)*s(n), where s(n) is the n-th even number in A026250. Also a(n) = position of n in A026253.

Table of values

List of values

n	a(n)
1	3
2	5
3	1
4	10
5	2
6	15
7	17
8	20
9	22
10	4
11	27
12	29
13	32
14	34
15	6
16	39
17	7
18	44
19	46
20	8
21	51
22	9
23	56
24	58
25	61
26	63
27	11
28	68
29	12
30	73
31	75
32	13
33	80
34	14
35	85
36	87
37	90
38	92
39	16
40	97
41	99
42	102
43	104
44	18
45	109
46	19
47	114
48	116
49	119
50	121
51	21
52	126
53	128
54	131
55	133
56	23
57	138
58	24
59	143
60	145

n	a(n)
1	3
2	5
3	1
4	10
5	2
6	15
7	17
8	20
9	22
10	4
11	27
12	29
13	32
14	34
15	6
16	39
17	7
18	44
19	46
20	8
21	51
22	9
23	56
24	58
25	61
26	63
27	11
28	68
29	12
30	73
31	75
32	13
33	80
34	14
35	85
36	87
37	90
38	92
39	16
40	97
41	99
42	102
43	104
44	18
45	109
46	19
47	114
48	116
49	119
50	121
51	21
52	126
53	128
54	131
55	133
56	23
57	138
58	24
59	143
60	145

n	a(n)
1	3
2	5
3	1
4	10
5	2
6	15
7	17
8	20
9	22
10	4
11	27
12	29
13	32
14	34
15	6
16	39
17	7
18	44
19	46
20	8
21	51
22	9
23	56
24	58
25	61
26	63
27	11
28	68
29	12
30	73
31	75
32	13
33	80
34	14
35	85
36	87
37	90
38	92
39	16
40	97
41	99
42	102
43	104
44	18
45	109
46	19
47	114
48	116
49	119
50	121
51	21
52	126
53	128
54	131
55	133
56	23
57	138
58	24
59	143
60	145