A372968 - cp's OEIS frontend

A372968 Square array T(n,k), n >= 1, k >= 1, read by antidiagonals, where T(n,k) = Sum_{1 <= x_1, x_2, ..., x_k <= n} n/gcd(x_1, x_2, ..., x_k, n).

n	a(n)
1	1
2	1
3	3
4	1
5	7
6	7
7	1
8	15
9	25
10	11
11	1
12	31
13	79
14	55
15	21
16	1
17	63
18	241
19	239
20	121
21	21
22	1
23	127
24	727
25	991
26	621
27	175
28	43
29	1
30	255
31	2185
32	4031
33	3121
34	1185
35	337
36	43
37	1
38	511
39	6559
40	16255
41	15621
42	7471
43	2395
44	439
45	61
46	1
47	1023
48	19681
49	65279
50	78121
51	45801
52	16801
53	3823
54	673
55	63

[1, 1, 3, 1, 7, 7, 1, 15, 25, 11, 1, 31, 79, 55, 21, 1, 63, 241, 239, 121, 21, 1, 127, 727, 991, 621, 175, 43, 1, 255, 2185, 4031, 3121, 1185, 337, 43, 1, 511, 6559, 16255, 15621, 7471, 2395, 439, 61, 1, 1023, 19681, 65279, 78121, 45801, 16801, 3823, 673, 63]

cp's OEIS Frontend

A372968 Square array T(n,k), n >= 1, k >= 1, read by antidiagonals, where T(n,k) = Sum_{1 <= x_1, x_2, ..., x_k <= n} n/gcd(x_1, x_2, ..., x_k, n).

Table of values

List of values