A121388 - cp's OEIS frontend

A121388 Table read by antidiagonals which classifies the proper odd numbers by form (i,j) where i and j are the number of prime factors of the form 4k-1 and 4k+1 respectively.

n	a(n)
1	3
2	5
3	7
4	9
5	13
6	11
7	15
8	21
9	17
10	19
11	25
12	35
13	33
14	29
15	23
16	27
17	65
18	39
19	49
20	37
21	31
22	45
23	63
24	85
25	51
26	57
27	41
28	43
29	75
30	105
31	99
32	145
33	55
34	69
35	53
36	47
37	125
38	175
39	117
40	147
41	169
42	87
43	77
44	61
45	59
46	81
47	325
48	195
49	153
50	171
51	185
52	91
53	93
54	73
55	67
56	135
57	189
58	425
59	255
60	165
61	207
62	205
63	95
64	121
65	89

[3, 5, 7, 9, 13, 11, 15, 21, 17, 19, 25, 35, 33, 29, 23, 27, 65, 39, 49, 37, 31, 45, 63, 85, 51, 57, 41, 43, 75, 105, 99, 145, 55, 69, 53, 47, 125, 175, 117, 147, 169, 87, 77, 61, 59, 81, 325, 195, 153, 171, 185, 91, 93, 73, 67, 135, 189, 425, 255, 165, 207, 205, 95, 121, 89]

cp's OEIS Frontend

A121388 Table read by antidiagonals which classifies the proper odd numbers by form (i,j) where i and j are the number of prime factors of the form 4k-1 and 4k+1 respectively.

Table of values

List of values

n	a(n)
1	3
2	5
3	7
4	9
5	13
6	11
7	15
8	21
9	17
10	19
11	25
12	35
13	33
14	29
15	23
16	27
17	65
18	39
19	49
20	37
21	31
22	45
23	63
24	85
25	51
26	57
27	41
28	43
29	75
30	105
31	99
32	145
33	55
34	69
35	53
36	47
37	125
38	175
39	117
40	147
41	169
42	87
43	77
44	61
45	59
46	81
47	325
48	195
49	153
50	171
51	185
52	91
53	93
54	73
55	67
56	135
57	189
58	425
59	255
60	165
61	207
62	205
63	95
64	121
65	89

n	a(n)
1	3
2	5
3	7
4	9
5	13
6	11
7	15
8	21
9	17
10	19
11	25
12	35
13	33
14	29
15	23
16	27
17	65
18	39
19	49
20	37
21	31
22	45
23	63
24	85
25	51
26	57
27	41
28	43
29	75
30	105
31	99
32	145
33	55
34	69
35	53
36	47
37	125
38	175
39	117
40	147
41	169
42	87
43	77
44	61
45	59
46	81
47	325
48	195
49	153
50	171
51	185
52	91
53	93
54	73
55	67
56	135
57	189
58	425
59	255
60	165
61	207
62	205
63	95
64	121
65	89

n	a(n)
1	3
2	5
3	7
4	9
5	13
6	11
7	15
8	21
9	17
10	19
11	25
12	35
13	33
14	29
15	23
16	27
17	65
18	39
19	49
20	37
21	31
22	45
23	63
24	85
25	51
26	57
27	41
28	43
29	75
30	105
31	99
32	145
33	55
34	69
35	53
36	47
37	125
38	175
39	117
40	147
41	169
42	87
43	77
44	61
45	59
46	81
47	325
48	195
49	153
50	171
51	185
52	91
53	93
54	73
55	67
56	135
57	189
58	425
59	255
60	165
61	207
62	205
63	95
64	121
65	89