A203990 - cp's OEIS frontend

A203990 Symmetric matrix based on f(i,j) = (i+j)*min(i,j), by antidiagonals.

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

[2, 3, 3, 4, 8, 4, 5, 10, 10, 5, 6, 12, 18, 12, 6, 7, 14, 21, 21, 14, 7, 8, 16, 24, 32, 24, 16, 8, 9, 18, 27, 36, 36, 27, 18, 9, 10, 20, 30, 40, 50, 40, 30, 20, 10, 11, 22, 33, 44, 55, 55, 44, 33, 22, 11, 12, 24, 36, 48, 60, 72, 60, 48, 36, 24, 12, 13, 26, 39, 52, 65, 78, 78, 65, 52, 39, 26, 13]

cp's OEIS Frontend

A203990 Symmetric matrix based on f(i,j) = (i+j)*min(i,j), by antidiagonals.

Table of values

List of values

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

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

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