A368608 - cp's OEIS frontend

A368608 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	2
2	1
3	4
4	5
5	2
6	1
7	6
8	9
9	8
10	4
11	2
12	1
13	8
14	13
15	14
16	12
17	6
18	4
19	2
20	1
21	10
22	17
23	20
24	20
25	16
26	9
27	6
28	4
29	2
30	1
31	12
32	21
33	26
34	28
35	26
36	21
37	12
38	9
39	6
40	4
41	2
42	1
43	14
44	25
45	32
46	36
47	36
48	33
49	26
50	16
51	12
52	9
53	6
54	4
55	2
56	1
57	16
58	29
59	38
60	44
61	46
62	45
63	40
64	32
65	20
66	16
67	12
68	9
69	6
70	4
71	2
72	1
73	18
74	33

[2, 1, 4, 5, 2, 1, 6, 9, 8, 4, 2, 1, 8, 13, 14, 12, 6, 4, 2, 1, 10, 17, 20, 20, 16, 9, 6, 4, 2, 1, 12, 21, 26, 28, 26, 21, 12, 9, 6, 4, 2, 1, 14, 25, 32, 36, 36, 33, 26, 16, 12, 9, 6, 4, 2, 1, 16, 29, 38, 44, 46, 45, 40, 32, 20, 16, 12, 9, 6, 4, 2, 1, 18, 33]

cp's OEIS Frontend

A368608 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	2
2	1
3	4
4	5
5	2
6	1
7	6
8	9
9	8
10	4
11	2
12	1
13	8
14	13
15	14
16	12
17	6
18	4
19	2
20	1
21	10
22	17
23	20
24	20
25	16
26	9
27	6
28	4
29	2
30	1
31	12
32	21
33	26
34	28
35	26
36	21
37	12
38	9
39	6
40	4
41	2
42	1
43	14
44	25
45	32
46	36
47	36
48	33
49	26
50	16
51	12
52	9
53	6
54	4
55	2
56	1
57	16
58	29
59	38
60	44
61	46
62	45
63	40
64	32
65	20
66	16
67	12
68	9
69	6
70	4
71	2
72	1
73	18
74	33

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

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