A368520 - cp's OEIS frontend

A368520 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 <= z.

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

[1, 2, 2, 2, 3, 4, 7, 2, 2, 4, 6, 12, 8, 6, 2, 2, 5, 8, 17, 14, 15, 6, 6, 2, 2, 6, 10, 22, 20, 24, 16, 12, 6, 6, 2, 2, 7, 12, 27, 26, 33, 26, 25, 12, 12, 6, 6, 2, 2, 8, 14, 32, 32, 42, 36, 38, 26, 20, 12, 12, 6, 6, 2, 2, 9, 16, 37, 38, 51, 46, 51, 40, 37, 20, 20]

cp's OEIS Frontend

A368520 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 <= z.

Table of values

List of values

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

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

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