A115010 - cp's OEIS frontend

A115010 Array read by antidiagonals: let V(m,n) = Sum_{i=1..m, j=1..n, gcd(i,j)=1} (m+1-i)(n+1-j), then T(m,n) = 2mn+m+n+2V(m,n), for m >= 1, n >= 1.

n	a(n)
1	6
2	13
3	13
4	22
5	28
6	22
7	33
8	49
9	49
10	33
11	46
12	74
13	86
14	74
15	46
16	61
17	105
18	131
19	131
20	105
21	61
22	78
23	140
24	188
25	200
26	188
27	140
28	78
29	97
30	181
31	251
32	289
33	289
34	251
35	181
36	97
37	118
38	226
39	326
40	386
41	418
42	386
43	326
44	226
45	118
46	141
47	277
48	409
49	503
50	559
51	559
52	503
53	409
54	277
55	141
56	166
57	332
58	502
59	632
60	730

[6, 13, 13, 22, 28, 22, 33, 49, 49, 33, 46, 74, 86, 74, 46, 61, 105, 131, 131, 105, 61, 78, 140, 188, 200, 188, 140, 78, 97, 181, 251, 289, 289, 251, 181, 97, 118, 226, 326, 386, 418, 386, 326, 226, 118, 141, 277, 409, 503, 559, 559, 503, 409, 277, 141, 166, 332, 502, 632, 730]

cp's OEIS Frontend

A115010 Array read by antidiagonals: let V(m,n) = Sum_{i=1..m, j=1..n, gcd(i,j)=1} (m+1-i)(n+1-j), then T(m,n) = 2mn+m+n+2V(m,n), for m >= 1, n >= 1.

Table of values

List of values

n	a(n)
1	6
2	13
3	13
4	22
5	28
6	22
7	33
8	49
9	49
10	33
11	46
12	74
13	86
14	74
15	46
16	61
17	105
18	131
19	131
20	105
21	61
22	78
23	140
24	188
25	200
26	188
27	140
28	78
29	97
30	181
31	251
32	289
33	289
34	251
35	181
36	97
37	118
38	226
39	326
40	386
41	418
42	386
43	326
44	226
45	118
46	141
47	277
48	409
49	503
50	559
51	559
52	503
53	409
54	277
55	141
56	166
57	332
58	502
59	632
60	730

n	a(n)
1	6
2	13
3	13
4	22
5	28
6	22
7	33
8	49
9	49
10	33
11	46
12	74
13	86
14	74
15	46
16	61
17	105
18	131
19	131
20	105
21	61
22	78
23	140
24	188
25	200
26	188
27	140
28	78
29	97
30	181
31	251
32	289
33	289
34	251
35	181
36	97
37	118
38	226
39	326
40	386
41	418
42	386
43	326
44	226
45	118
46	141
47	277
48	409
49	503
50	559
51	559
52	503
53	409
54	277
55	141
56	166
57	332
58	502
59	632
60	730

cp's OEIS Frontend

A115010 Array read by antidiagonals: let V(m,n) = Sum_{i=1..m, j=1..n, gcd(i,j)=1} (m+1-i)*(n+1-j), then T(m,n) = 2*m*n+m+n+2*V(m,n), for m >= 1, n >= 1.

Table of values

List of values

A115010 Array read by antidiagonals: let V(m,n) = Sum_{i=1..m, j=1..n, gcd(i,j)=1} (m+1-i)(n+1-j), then T(m,n) = 2mn+m+n+2V(m,n), for m >= 1, n >= 1.

n	a(n)
1	6
2	13
3	13
4	22
5	28
6	22
7	33
8	49
9	49
10	33
11	46
12	74
13	86
14	74
15	46
16	61
17	105
18	131
19	131
20	105
21	61
22	78
23	140
24	188
25	200
26	188
27	140
28	78
29	97
30	181
31	251
32	289
33	289
34	251
35	181
36	97
37	118
38	226
39	326
40	386
41	418
42	386
43	326
44	226
45	118
46	141
47	277
48	409
49	503
50	559
51	559
52	503
53	409
54	277
55	141
56	166
57	332
58	502
59	632
60	730