A384223 - cp's OEIS frontend

A384223 Irregular triangle read by rows: T(n,k) is the sum of the k-th odd divisor and the next even divisors that are less than the next odd divisor of n, with n >= 1, k >= 1.

n	a(n)
1	1
2	3
3	1
4	3
5	7
6	1
7	5
8	3
9	9
10	1
11	7
12	15
13	1
14	3
15	9
16	3
17	15
18	1
19	11
20	3
21	25
22	1
23	13
24	3
25	21
26	1
27	3
28	5
29	15
30	31
31	1
32	17
33	3
34	9
35	27
36	1
37	19
38	7
39	35
40	1
41	3
42	7
43	21
44	3
45	33
46	1
47	23
48	3
49	57
50	1
51	5
52	25
53	3
54	39
55	1
56	3
57	9
58	27
59	7
60	49
61	1
62	29
63	3
64	3
65	21
66	45
67	1
68	31
69	63
70	1
71	3
72	11
73	33
74	3
75	51
76	1
77	5
78	7
79	35
80	3
81	13
82	75
83	1
84	37
85	3
86	57
87	1
88	3
89	13
90	39
91	7
92	83

[1, 3, 1, 3, 7, 1, 5, 3, 9, 1, 7, 15, 1, 3, 9, 3, 15, 1, 11, 3, 25, 1, 13, 3, 21, 1, 3, 5, 15, 31, 1, 17, 3, 9, 27, 1, 19, 7, 35, 1, 3, 7, 21, 3, 33, 1, 23, 3, 57, 1, 5, 25, 3, 39, 1, 3, 9, 27, 7, 49, 1, 29, 3, 3, 21, 45, 1, 31, 63, 1, 3, 11, 33, 3, 51, 1, 5, 7, 35, 3, 13, 75, 1, 37, 3, 57, 1, 3, 13, 39, 7, 83]

cp's OEIS Frontend

A384223 Irregular triangle read by rows: T(n,k) is the sum of the k-th odd divisor and the next even divisors that are less than the next odd divisor of n, with n >= 1, k >= 1.

Table of values

List of values

n	a(n)
1	1
2	3
3	1
4	3
5	7
6	1
7	5
8	3
9	9
10	1
11	7
12	15
13	1
14	3
15	9
16	3
17	15
18	1
19	11
20	3
21	25
22	1
23	13
24	3
25	21
26	1
27	3
28	5
29	15
30	31
31	1
32	17
33	3
34	9
35	27
36	1
37	19
38	7
39	35
40	1
41	3
42	7
43	21
44	3
45	33
46	1
47	23
48	3
49	57
50	1
51	5
52	25
53	3
54	39
55	1
56	3
57	9
58	27
59	7
60	49
61	1
62	29
63	3
64	3
65	21
66	45
67	1
68	31
69	63
70	1
71	3
72	11
73	33
74	3
75	51
76	1
77	5
78	7
79	35
80	3
81	13
82	75
83	1
84	37
85	3
86	57
87	1
88	3
89	13
90	39
91	7
92	83

n	a(n)
1	1
2	3
3	1
4	3
5	7
6	1
7	5
8	3
9	9
10	1
11	7
12	15
13	1
14	3
15	9
16	3
17	15
18	1
19	11
20	3
21	25
22	1
23	13
24	3
25	21
26	1
27	3
28	5
29	15
30	31
31	1
32	17
33	3
34	9
35	27
36	1
37	19
38	7
39	35
40	1
41	3
42	7
43	21
44	3
45	33
46	1
47	23
48	3
49	57
50	1
51	5
52	25
53	3
54	39
55	1
56	3
57	9
58	27
59	7
60	49
61	1
62	29
63	3
64	3
65	21
66	45
67	1
68	31
69	63
70	1
71	3
72	11
73	33
74	3
75	51
76	1
77	5
78	7
79	35
80	3
81	13
82	75
83	1
84	37
85	3
86	57
87	1
88	3
89	13
90	39
91	7
92	83

n	a(n)
1	1
2	3
3	1
4	3
5	7
6	1
7	5
8	3
9	9
10	1
11	7
12	15
13	1
14	3
15	9
16	3
17	15
18	1
19	11
20	3
21	25
22	1
23	13
24	3
25	21
26	1
27	3
28	5
29	15
30	31
31	1
32	17
33	3
34	9
35	27
36	1
37	19
38	7
39	35
40	1
41	3
42	7
43	21
44	3
45	33
46	1
47	23
48	3
49	57
50	1
51	5
52	25
53	3
54	39
55	1
56	3
57	9
58	27
59	7
60	49
61	1
62	29
63	3
64	3
65	21
66	45
67	1
68	31
69	63
70	1
71	3
72	11
73	33
74	3
75	51
76	1
77	5
78	7
79	35
80	3
81	13
82	75
83	1
84	37
85	3
86	57
87	1
88	3
89	13
90	39
91	7
92	83