A066248 - cp's OEIS frontend

A066248 a(n) = if n+1 is prime then A049084(n+1)2 else A066246(n+1)2 - 1.

n	a(n)
1	2
2	4
3	1
4	6
5	3
6	8
7	5
8	7
9	9
10	10
11	11
12	12
13	13
14	15
15	17
16	14
17	19
18	16
19	21
20	23
21	25
22	18
23	27
24	29
25	31
26	33
27	35
28	20
29	37
30	22
31	39
32	41
33	43
34	45
35	47
36	24
37	49
38	51
39	53
40	26
41	55
42	28
43	57
44	59
45	61
46	30
47	63
48	65
49	67
50	69
51	71
52	32
53	73
54	75
55	77
56	79
57	81
58	34
59	83
60	36
61	85
62	87
63	89
64	91
65	93
66	38
67	95
68	97
69	99
70	40
71	101
72	42

[2, 4, 1, 6, 3, 8, 5, 7, 9, 10, 11, 12, 13, 15, 17, 14, 19, 16, 21, 23, 25, 18, 27, 29, 31, 33, 35, 20, 37, 22, 39, 41, 43, 45, 47, 24, 49, 51, 53, 26, 55, 28, 57, 59, 61, 30, 63, 65, 67, 69, 71, 32, 73, 75, 77, 79, 81, 34, 83, 36, 85, 87, 89, 91, 93, 38, 95, 97, 99, 40, 101, 42]

cp's OEIS Frontend

A066248 a(n) = if n+1 is prime then A049084(n+1)2 else A066246(n+1)2 - 1.

Table of values

List of values

n	a(n)
1	2
2	4
3	1
4	6
5	3
6	8
7	5
8	7
9	9
10	10
11	11
12	12
13	13
14	15
15	17
16	14
17	19
18	16
19	21
20	23
21	25
22	18
23	27
24	29
25	31
26	33
27	35
28	20
29	37
30	22
31	39
32	41
33	43
34	45
35	47
36	24
37	49
38	51
39	53
40	26
41	55
42	28
43	57
44	59
45	61
46	30
47	63
48	65
49	67
50	69
51	71
52	32
53	73
54	75
55	77
56	79
57	81
58	34
59	83
60	36
61	85
62	87
63	89
64	91
65	93
66	38
67	95
68	97
69	99
70	40
71	101
72	42

n	a(n)
1	2
2	4
3	1
4	6
5	3
6	8
7	5
8	7
9	9
10	10
11	11
12	12
13	13
14	15
15	17
16	14
17	19
18	16
19	21
20	23
21	25
22	18
23	27
24	29
25	31
26	33
27	35
28	20
29	37
30	22
31	39
32	41
33	43
34	45
35	47
36	24
37	49
38	51
39	53
40	26
41	55
42	28
43	57
44	59
45	61
46	30
47	63
48	65
49	67
50	69
51	71
52	32
53	73
54	75
55	77
56	79
57	81
58	34
59	83
60	36
61	85
62	87
63	89
64	91
65	93
66	38
67	95
68	97
69	99
70	40
71	101
72	42

cp's OEIS Frontend

A066248 a(n) = if n+1 is prime then A049084(n+1)*2 else A066246(n+1)*2 - 1.

Table of values

List of values

A066248 a(n) = if n+1 is prime then A049084(n+1)2 else A066246(n+1)2 - 1.

n	a(n)
1	2
2	4
3	1
4	6
5	3
6	8
7	5
8	7
9	9
10	10
11	11
12	12
13	13
14	15
15	17
16	14
17	19
18	16
19	21
20	23
21	25
22	18
23	27
24	29
25	31
26	33
27	35
28	20
29	37
30	22
31	39
32	41
33	43
34	45
35	47
36	24
37	49
38	51
39	53
40	26
41	55
42	28
43	57
44	59
45	61
46	30
47	63
48	65
49	67
50	69
51	71
52	32
53	73
54	75
55	77
56	79
57	81
58	34
59	83
60	36
61	85
62	87
63	89
64	91
65	93
66	38
67	95
68	97
69	99
70	40
71	101
72	42