A157636 - cp's OEIS frontend

A157636 Triangle read by rows: T(n, k) = 1 if k=0 or k=n, otherwise = nk(n-k)/2.

n	a(n)
0	1
1	1
2	1
3	1
4	1
5	1
6	1
7	3
8	3
9	1
10	1
11	6
12	8
13	6
14	1
15	1
16	10
17	15
18	15
19	10
20	1
21	1
22	15
23	24
24	27
25	24
26	15
27	1
28	1
29	21
30	35
31	42
32	42
33	35
34	21
35	1
36	1
37	28
38	48
39	60
40	64
41	60
42	48
43	28
44	1
45	1
46	36
47	63
48	81
49	90
50	90
51	81
52	63
53	36
54	1
55	1
56	45
57	80
58	105
59	120
60	125
61	120
62	105
63	80
64	45
65	1

[1, 1, 1, 1, 1, 1, 1, 3, 3, 1, 1, 6, 8, 6, 1, 1, 10, 15, 15, 10, 1, 1, 15, 24, 27, 24, 15, 1, 1, 21, 35, 42, 42, 35, 21, 1, 1, 28, 48, 60, 64, 60, 48, 28, 1, 1, 36, 63, 81, 90, 90, 81, 63, 36, 1, 1, 45, 80, 105, 120, 125, 120, 105, 80, 45, 1]

cp's OEIS Frontend

A157636 Triangle read by rows: T(n, k) = 1 if k=0 or k=n, otherwise = nk(n-k)/2.

Table of values

List of values

n	a(n)
0	1
1	1
2	1
3	1
4	1
5	1
6	1
7	3
8	3
9	1
10	1
11	6
12	8
13	6
14	1
15	1
16	10
17	15
18	15
19	10
20	1
21	1
22	15
23	24
24	27
25	24
26	15
27	1
28	1
29	21
30	35
31	42
32	42
33	35
34	21
35	1
36	1
37	28
38	48
39	60
40	64
41	60
42	48
43	28
44	1
45	1
46	36
47	63
48	81
49	90
50	90
51	81
52	63
53	36
54	1
55	1
56	45
57	80
58	105
59	120
60	125
61	120
62	105
63	80
64	45
65	1

n	a(n)
0	1
1	1
2	1
3	1
4	1
5	1
6	1
7	3
8	3
9	1
10	1
11	6
12	8
13	6
14	1
15	1
16	10
17	15
18	15
19	10
20	1
21	1
22	15
23	24
24	27
25	24
26	15
27	1
28	1
29	21
30	35
31	42
32	42
33	35
34	21
35	1
36	1
37	28
38	48
39	60
40	64
41	60
42	48
43	28
44	1
45	1
46	36
47	63
48	81
49	90
50	90
51	81
52	63
53	36
54	1
55	1
56	45
57	80
58	105
59	120
60	125
61	120
62	105
63	80
64	45
65	1

cp's OEIS Frontend

A157636 Triangle read by rows: T(n, k) = 1 if k=0 or k=n, otherwise = n*k*(n-k)/2.

Table of values

List of values

A157636 Triangle read by rows: T(n, k) = 1 if k=0 or k=n, otherwise = nk(n-k)/2.

n	a(n)
0	1
1	1
2	1
3	1
4	1
5	1
6	1
7	3
8	3
9	1
10	1
11	6
12	8
13	6
14	1
15	1
16	10
17	15
18	15
19	10
20	1
21	1
22	15
23	24
24	27
25	24
26	15
27	1
28	1
29	21
30	35
31	42
32	42
33	35
34	21
35	1
36	1
37	28
38	48
39	60
40	64
41	60
42	48
43	28
44	1
45	1
46	36
47	63
48	81
49	90
50	90
51	81
52	63
53	36
54	1
55	1
56	45
57	80
58	105
59	120
60	125
61	120
62	105
63	80
64	45
65	1