A368437 - cp's OEIS frontend

A368437 Irregular triangular array T, read by rows: T(n,k) = number of sums |x-y| + |y-z| = 2n+1-k, where (x,y,z) is a permutation of three distinct numbers taken from {0,1,...,n}, for n >= 2, k >= 2.

n	a(n)
1	4
2	2
3	4
4	4
5	12
6	4
7	4
8	4
9	12
10	14
11	20
12	6
13	4
14	4
15	12
16	12
17	28
18	24
19	28
20	8
21	4
22	4
23	12
24	12
25	24
26	30
27	44
28	34
29	36
30	10
31	4
32	4
33	12
34	12
35	24
36	24
37	48
38	48
39	60
40	44
41	44
42	12
43	4
44	4
45	12
46	12
47	24
48	24
49	40
50	50
51	72
52	66
53	76
54	54
55	52
56	14
57	4
58	4
59	12
60	12
61	24
62	24
63	40
64	40
65	72
66	76
67	96
68	84
69	92

[4, 2, 4, 4, 12, 4, 4, 4, 12, 14, 20, 6, 4, 4, 12, 12, 28, 24, 28, 8, 4, 4, 12, 12, 24, 30, 44, 34, 36, 10, 4, 4, 12, 12, 24, 24, 48, 48, 60, 44, 44, 12, 4, 4, 12, 12, 24, 24, 40, 50, 72, 66, 76, 54, 52, 14, 4, 4, 12, 12, 24, 24, 40, 40, 72, 76, 96, 84, 92]

cp's OEIS Frontend

A368437 Irregular triangular array T, read by rows: T(n,k) = number of sums |x-y| + |y-z| = 2n+1-k, where (x,y,z) is a permutation of three distinct numbers taken from {0,1,...,n}, for n >= 2, k >= 2.

Table of values

List of values

n	a(n)
1	4
2	2
3	4
4	4
5	12
6	4
7	4
8	4
9	12
10	14
11	20
12	6
13	4
14	4
15	12
16	12
17	28
18	24
19	28
20	8
21	4
22	4
23	12
24	12
25	24
26	30
27	44
28	34
29	36
30	10
31	4
32	4
33	12
34	12
35	24
36	24
37	48
38	48
39	60
40	44
41	44
42	12
43	4
44	4
45	12
46	12
47	24
48	24
49	40
50	50
51	72
52	66
53	76
54	54
55	52
56	14
57	4
58	4
59	12
60	12
61	24
62	24
63	40
64	40
65	72
66	76
67	96
68	84
69	92

n	a(n)
1	4
2	2
3	4
4	4
5	12
6	4
7	4
8	4
9	12
10	14
11	20
12	6
13	4
14	4
15	12
16	12
17	28
18	24
19	28
20	8
21	4
22	4
23	12
24	12
25	24
26	30
27	44
28	34
29	36
30	10
31	4
32	4
33	12
34	12
35	24
36	24
37	48
38	48
39	60
40	44
41	44
42	12
43	4
44	4
45	12
46	12
47	24
48	24
49	40
50	50
51	72
52	66
53	76
54	54
55	52
56	14
57	4
58	4
59	12
60	12
61	24
62	24
63	40
64	40
65	72
66	76
67	96
68	84
69	92

n	a(n)
1	4
2	2
3	4
4	4
5	12
6	4
7	4
8	4
9	12
10	14
11	20
12	6
13	4
14	4
15	12
16	12
17	28
18	24
19	28
20	8
21	4
22	4
23	12
24	12
25	24
26	30
27	44
28	34
29	36
30	10
31	4
32	4
33	12
34	12
35	24
36	24
37	48
38	48
39	60
40	44
41	44
42	12
43	4
44	4
45	12
46	12
47	24
48	24
49	40
50	50
51	72
52	66
53	76
54	54
55	52
56	14
57	4
58	4
59	12
60	12
61	24
62	24
63	40
64	40
65	72
66	76
67	96
68	84
69	92