A368158 - cp's OEIS frontend

A368158 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.

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

[2, 3, 1, 3, 6, 6, 2, 1, 4, 9, 11, 9, 4, 2, 1, 5, 12, 16, 16, 13, 6, 4, 2, 1, 6, 15, 21, 23, 22, 17, 9, 6, 4, 2, 1, 7, 18, 26, 30, 31, 28, 22, 12, 9, 6, 4, 2, 1, 8, 21, 31, 37, 40, 39, 35, 27, 16, 12, 9, 6, 4, 2, 1, 9, 24, 36, 44, 49, 50, 48, 42, 33, 20, 16]

cp's OEIS Frontend

A368158 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.

Table of values

List of values

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

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

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