A094178 - cp's OEIS frontend

A094178 Numbers n such that 4n+1 is divisible only by primes of form 4m+1 (i.e., by the Pythagorean primes A002144).

n	a(n)
1	1
2	3
3	4
4	6
5	7
6	9
7	10
8	13
9	15
10	16
11	18
12	21
13	22
14	24
15	25
16	27
17	28
18	31
19	34
20	36
21	37
22	39
23	42
24	43
25	45
26	46
27	48
28	49
29	51
30	55
31	57
32	58
33	60
34	64
35	66
36	67
37	69
38	70
39	72
40	73
41	76
42	78
43	79
44	81
45	84
46	87
47	88
48	91
49	93
50	94
51	97
52	99
53	100
54	102
55	105
56	106
57	108
58	111
59	112
60	114
61	115
62	120
63	121
64	123
65	126
66	127

[1, 3, 4, 6, 7, 9, 10, 13, 15, 16, 18, 21, 22, 24, 25, 27, 28, 31, 34, 36, 37, 39, 42, 43, 45, 46, 48, 49, 51, 55, 57, 58, 60, 64, 66, 67, 69, 70, 72, 73, 76, 78, 79, 81, 84, 87, 88, 91, 93, 94, 97, 99, 100, 102, 105, 106, 108, 111, 112, 114, 115, 120, 121, 123, 126, 127]

cp's OEIS Frontend

A094178 Numbers n such that 4n+1 is divisible only by primes of form 4m+1 (i.e., by the Pythagorean primes A002144).

Table of values

List of values

n	a(n)
1	1
2	3
3	4
4	6
5	7
6	9
7	10
8	13
9	15
10	16
11	18
12	21
13	22
14	24
15	25
16	27
17	28
18	31
19	34
20	36
21	37
22	39
23	42
24	43
25	45
26	46
27	48
28	49
29	51
30	55
31	57
32	58
33	60
34	64
35	66
36	67
37	69
38	70
39	72
40	73
41	76
42	78
43	79
44	81
45	84
46	87
47	88
48	91
49	93
50	94
51	97
52	99
53	100
54	102
55	105
56	106
57	108
58	111
59	112
60	114
61	115
62	120
63	121
64	123
65	126
66	127

n	a(n)
1	1
2	3
3	4
4	6
5	7
6	9
7	10
8	13
9	15
10	16
11	18
12	21
13	22
14	24
15	25
16	27
17	28
18	31
19	34
20	36
21	37
22	39
23	42
24	43
25	45
26	46
27	48
28	49
29	51
30	55
31	57
32	58
33	60
34	64
35	66
36	67
37	69
38	70
39	72
40	73
41	76
42	78
43	79
44	81
45	84
46	87
47	88
48	91
49	93
50	94
51	97
52	99
53	100
54	102
55	105
56	106
57	108
58	111
59	112
60	114
61	115
62	120
63	121
64	123
65	126
66	127

n	a(n)
1	1
2	3
3	4
4	6
5	7
6	9
7	10
8	13
9	15
10	16
11	18
12	21
13	22
14	24
15	25
16	27
17	28
18	31
19	34
20	36
21	37
22	39
23	42
24	43
25	45
26	46
27	48
28	49
29	51
30	55
31	57
32	58
33	60
34	64
35	66
36	67
37	69
38	70
39	72
40	73
41	76
42	78
43	79
44	81
45	84
46	87
47	88
48	91
49	93
50	94
51	97
52	99
53	100
54	102
55	105
56	106
57	108
58	111
59	112
60	114
61	115
62	120
63	121
64	123
65	126
66	127