A271584 - cp's OEIS frontend

A271584 Irregular triangle read by rows: alternate (k-1)*k, k^2, for k = 0 to n.

n	a(n)
0	0
1	0
2	0
3	0
4	0
5	1
6	0
7	0
8	2
9	0
10	1
11	4
12	0
13	0
14	2
15	6
16	0
17	1
18	4
19	9
20	0
21	0
22	2
23	6
24	12
25	0
26	1
27	4
28	9
29	16
30	0
31	0
32	2
33	6
34	12
35	20
36	0
37	1
38	4
39	9
40	16
41	25
42	0
43	0
44	2
45	6
46	12
47	20
48	30
49	0
50	1
51	4
52	9
53	16
54	25
55	36
56	0
57	0
58	2
59	6
60	12
61	20
62	30
63	42
64	0
65	1
66	4
67	9
68	16
69	25
70	36
71	49

[0, 0, 0, 0, 0, 1, 0, 0, 2, 0, 1, 4, 0, 0, 2, 6, 0, 1, 4, 9, 0, 0, 2, 6, 12, 0, 1, 4, 9, 16, 0, 0, 2, 6, 12, 20, 0, 1, 4, 9, 16, 25, 0, 0, 2, 6, 12, 20, 30, 0, 1, 4, 9, 16, 25, 36, 0, 0, 2, 6, 12, 20, 30, 42, 0, 1, 4, 9, 16, 25, 36, 49]

cp's OEIS Frontend

A271584 Irregular triangle read by rows: alternate (k-1)*k, k^2, for k = 0 to n.

Table of values

List of values

n	a(n)
0	0
1	0
2	0
3	0
4	0
5	1
6	0
7	0
8	2
9	0
10	1
11	4
12	0
13	0
14	2
15	6
16	0
17	1
18	4
19	9
20	0
21	0
22	2
23	6
24	12
25	0
26	1
27	4
28	9
29	16
30	0
31	0
32	2
33	6
34	12
35	20
36	0
37	1
38	4
39	9
40	16
41	25
42	0
43	0
44	2
45	6
46	12
47	20
48	30
49	0
50	1
51	4
52	9
53	16
54	25
55	36
56	0
57	0
58	2
59	6
60	12
61	20
62	30
63	42
64	0
65	1
66	4
67	9
68	16
69	25
70	36
71	49

n	a(n)
0	0
1	0
2	0
3	0
4	0
5	1
6	0
7	0
8	2
9	0
10	1
11	4
12	0
13	0
14	2
15	6
16	0
17	1
18	4
19	9
20	0
21	0
22	2
23	6
24	12
25	0
26	1
27	4
28	9
29	16
30	0
31	0
32	2
33	6
34	12
35	20
36	0
37	1
38	4
39	9
40	16
41	25
42	0
43	0
44	2
45	6
46	12
47	20
48	30
49	0
50	1
51	4
52	9
53	16
54	25
55	36
56	0
57	0
58	2
59	6
60	12
61	20
62	30
63	42
64	0
65	1
66	4
67	9
68	16
69	25
70	36
71	49

n	a(n)
0	0
1	0
2	0
3	0
4	0
5	1
6	0
7	0
8	2
9	0
10	1
11	4
12	0
13	0
14	2
15	6
16	0
17	1
18	4
19	9
20	0
21	0
22	2
23	6
24	12
25	0
26	1
27	4
28	9
29	16
30	0
31	0
32	2
33	6
34	12
35	20
36	0
37	1
38	4
39	9
40	16
41	25
42	0
43	0
44	2
45	6
46	12
47	20
48	30
49	0
50	1
51	4
52	9
53	16
54	25
55	36
56	0
57	0
58	2
59	6
60	12
61	20
62	30
63	42
64	0
65	1
66	4
67	9
68	16
69	25
70	36
71	49