A368605 - cp's OEIS frontend

A368605 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	1
3	2
4	3
5	2
6	1
7	3
8	5
9	5
10	4
11	2
12	1
13	4
14	7
15	8
16	8
17	6
18	4
19	2
20	1
21	5
22	9
23	11
24	12
25	11
26	9
27	6
28	4
29	2
30	1
31	6
32	11
33	14
34	16
35	16
36	15
37	12
38	9
39	6
40	4
41	2
42	1
43	7
44	13
45	17
46	20
47	21
48	21
49	19
50	16
51	12
52	9
53	6
54	4
55	2
56	1
57	8
58	15
59	20
60	24
61	26
62	27
63	26
64	24
65	20
66	16
67	12
68	9
69	6
70	4
71	2
72	1
73	9
74	17
75	23
76	28

[1, 1, 2, 3, 2, 1, 3, 5, 5, 4, 2, 1, 4, 7, 8, 8, 6, 4, 2, 1, 5, 9, 11, 12, 11, 9, 6, 4, 2, 1, 6, 11, 14, 16, 16, 15, 12, 9, 6, 4, 2, 1, 7, 13, 17, 20, 21, 21, 19, 16, 12, 9, 6, 4, 2, 1, 8, 15, 20, 24, 26, 27, 26, 24, 20, 16, 12, 9, 6, 4, 2, 1, 9, 17, 23, 28]

cp's OEIS Frontend

A368605 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	1
3	2
4	3
5	2
6	1
7	3
8	5
9	5
10	4
11	2
12	1
13	4
14	7
15	8
16	8
17	6
18	4
19	2
20	1
21	5
22	9
23	11
24	12
25	11
26	9
27	6
28	4
29	2
30	1
31	6
32	11
33	14
34	16
35	16
36	15
37	12
38	9
39	6
40	4
41	2
42	1
43	7
44	13
45	17
46	20
47	21
48	21
49	19
50	16
51	12
52	9
53	6
54	4
55	2
56	1
57	8
58	15
59	20
60	24
61	26
62	27
63	26
64	24
65	20
66	16
67	12
68	9
69	6
70	4
71	2
72	1
73	9
74	17
75	23
76	28

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

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