A071821 - cp's OEIS frontend

A071821 Numbers whose largest prime factor is of the form 4k+1.

n	a(n)
1	5
2	10
3	13
4	15
5	17
6	20
7	25
8	26
9	29
10	30
11	34
12	37
13	39
14	40
15	41
16	45
17	50
18	51
19	52
20	53
21	58
22	60
23	61
24	65
25	68
26	73
27	74
28	75
29	78
30	80
31	82
32	85
33	87
34	89
35	90
36	91
37	97
38	100
39	101
40	102
41	104
42	106
43	109
44	111
45	113
46	116
47	117
48	119
49	120
50	122
51	123
52	125
53	130
54	135
55	136
56	137
57	143
58	145
59	146
60	148
61	149

[5, 10, 13, 15, 17, 20, 25, 26, 29, 30, 34, 37, 39, 40, 41, 45, 50, 51, 52, 53, 58, 60, 61, 65, 68, 73, 74, 75, 78, 80, 82, 85, 87, 89, 90, 91, 97, 100, 101, 102, 104, 106, 109, 111, 113, 116, 117, 119, 120, 122, 123, 125, 130, 135, 136, 137, 143, 145, 146, 148, 149]

cp's OEIS Frontend

A071821 Numbers whose largest prime factor is of the form 4k+1.

Table of values

List of values

n	a(n)
1	5
2	10
3	13
4	15
5	17
6	20
7	25
8	26
9	29
10	30
11	34
12	37
13	39
14	40
15	41
16	45
17	50
18	51
19	52
20	53
21	58
22	60
23	61
24	65
25	68
26	73
27	74
28	75
29	78
30	80
31	82
32	85
33	87
34	89
35	90
36	91
37	97
38	100
39	101
40	102
41	104
42	106
43	109
44	111
45	113
46	116
47	117
48	119
49	120
50	122
51	123
52	125
53	130
54	135
55	136
56	137
57	143
58	145
59	146
60	148
61	149

n	a(n)
1	5
2	10
3	13
4	15
5	17
6	20
7	25
8	26
9	29
10	30
11	34
12	37
13	39
14	40
15	41
16	45
17	50
18	51
19	52
20	53
21	58
22	60
23	61
24	65
25	68
26	73
27	74
28	75
29	78
30	80
31	82
32	85
33	87
34	89
35	90
36	91
37	97
38	100
39	101
40	102
41	104
42	106
43	109
44	111
45	113
46	116
47	117
48	119
49	120
50	122
51	123
52	125
53	130
54	135
55	136
56	137
57	143
58	145
59	146
60	148
61	149

n	a(n)
1	5
2	10
3	13
4	15
5	17
6	20
7	25
8	26
9	29
10	30
11	34
12	37
13	39
14	40
15	41
16	45
17	50
18	51
19	52
20	53
21	58
22	60
23	61
24	65
25	68
26	73
27	74
28	75
29	78
30	80
31	82
32	85
33	87
34	89
35	90
36	91
37	97
38	100
39	101
40	102
41	104
42	106
43	109
44	111
45	113
46	116
47	117
48	119
49	120
50	122
51	123
52	125
53	130
54	135
55	136
56	137
57	143
58	145
59	146
60	148
61	149