A368607 - cp's OEIS frontend

A368607 Irregular triangular array T, read by rows: T(n,k) = number of sums |x-y| + |y-z| = k, where x,y,z are in {1,2,...,n} and x != y and y < z.

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

[1, 3, 2, 1, 5, 6, 4, 2, 1, 7, 10, 10, 6, 4, 2, 1, 9, 14, 16, 14, 9, 6, 4, 2, 1, 11, 18, 22, 22, 19, 12, 9, 6, 4, 2, 1, 13, 22, 28, 30, 29, 24, 16, 12, 9, 6, 4, 2, 1, 15, 26, 34, 38, 39, 36, 30, 20, 16, 12, 9, 6, 4, 2, 1, 17, 30, 40, 46, 49, 48, 44, 36, 25]

cp's OEIS Frontend

A368607 Irregular triangular array T, read by rows: T(n,k) = number of sums |x-y| + |y-z| = k, where x,y,z are in {1,2,...,n} and x != y and y < z.

Table of values

List of values

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

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

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