A339496 - cp's OEIS frontend

A339496 T(n, k) = Sum(divisors(k) union {k*j : j = 2..floor(n/k)}). Triangle read by rows.

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

[1, 3, 3, 6, 3, 4, 10, 7, 4, 7, 15, 7, 4, 7, 6, 21, 13, 10, 7, 6, 12, 28, 13, 10, 7, 6, 12, 8, 36, 21, 10, 15, 6, 12, 8, 15, 45, 21, 19, 15, 6, 12, 8, 15, 13, 55, 31, 19, 15, 16, 12, 8, 15, 13, 18, 66, 31, 19, 15, 16, 12, 8, 15, 13, 18, 12, 78, 43, 31, 27, 16, 24, 8, 15, 13, 18, 12, 28]

cp's OEIS Frontend

A339496 T(n, k) = Sum(divisors(k) union {k*j : j = 2..floor(n/k)}). Triangle read by rows.

Table of values

List of values

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

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

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