A215189 - cp's OEIS frontend

A215189 Array t(n,k) of the family ((n+k)/gcd(n+k,4))*(n/gcd(n,4)), read by antidiagonals.

n	a(n)
0	0
1	1
2	0
3	1
4	1
5	0
6	9
7	3
8	3
9	0
10	1
11	3
12	1
13	1
14	0
15	25
16	5
17	15
18	5
19	5
20	0
21	9
22	15
23	3
24	9
25	3
26	3
27	0
28	49
29	21
30	35
31	7
32	21
33	7
34	7
35	0
36	4
37	14
38	6
39	10
40	2
41	6
42	2
43	2
44	0
45	81
46	18
47	63
48	27
49	45
50	9
51	27
52	9
53	9
54	0
55	25
56	45
57	10
58	35
59	15
60	25
61	5
62	15
63	5
64	5
65	0
66	121
67	55
68	99
69	22
70	77
71	33
72	55
73	11
74	33
75	11
76	11
77	0
78	9
79	33
80	15
81	27
82	6
83	21
84	9
85	15
86	3
87	9
88	3
89	3
90	0

[0, 1, 0, 1, 1, 0, 9, 3, 3, 0, 1, 3, 1, 1, 0, 25, 5, 15, 5, 5, 0, 9, 15, 3, 9, 3, 3, 0, 49, 21, 35, 7, 21, 7, 7, 0, 4, 14, 6, 10, 2, 6, 2, 2, 0, 81, 18, 63, 27, 45, 9, 27, 9, 9, 0, 25, 45, 10, 35, 15, 25, 5, 15, 5, 5, 0, 121, 55, 99, 22, 77, 33, 55, 11, 33, 11, 11, 0, 9, 33, 15, 27, 6, 21, 9, 15, 3, 9, 3, 3, 0]

cp's OEIS Frontend

A215189 Array t(n,k) of the family ((n+k)/gcd(n+k,4))*(n/gcd(n,4)), read by antidiagonals.

Table of values

List of values

n	a(n)
0	0
1	1
2	0
3	1
4	1
5	0
6	9
7	3
8	3
9	0
10	1
11	3
12	1
13	1
14	0
15	25
16	5
17	15
18	5
19	5
20	0
21	9
22	15
23	3
24	9
25	3
26	3
27	0
28	49
29	21
30	35
31	7
32	21
33	7
34	7
35	0
36	4
37	14
38	6
39	10
40	2
41	6
42	2
43	2
44	0
45	81
46	18
47	63
48	27
49	45
50	9
51	27
52	9
53	9
54	0
55	25
56	45
57	10
58	35
59	15
60	25
61	5
62	15
63	5
64	5
65	0
66	121
67	55
68	99
69	22
70	77
71	33
72	55
73	11
74	33
75	11
76	11
77	0
78	9
79	33
80	15
81	27
82	6
83	21
84	9
85	15
86	3
87	9
88	3
89	3
90	0

n	a(n)
0	0
1	1
2	0
3	1
4	1
5	0
6	9
7	3
8	3
9	0
10	1
11	3
12	1
13	1
14	0
15	25
16	5
17	15
18	5
19	5
20	0
21	9
22	15
23	3
24	9
25	3
26	3
27	0
28	49
29	21
30	35
31	7
32	21
33	7
34	7
35	0
36	4
37	14
38	6
39	10
40	2
41	6
42	2
43	2
44	0
45	81
46	18
47	63
48	27
49	45
50	9
51	27
52	9
53	9
54	0
55	25
56	45
57	10
58	35
59	15
60	25
61	5
62	15
63	5
64	5
65	0
66	121
67	55
68	99
69	22
70	77
71	33
72	55
73	11
74	33
75	11
76	11
77	0
78	9
79	33
80	15
81	27
82	6
83	21
84	9
85	15
86	3
87	9
88	3
89	3
90	0

n	a(n)
0	0
1	1
2	0
3	1
4	1
5	0
6	9
7	3
8	3
9	0
10	1
11	3
12	1
13	1
14	0
15	25
16	5
17	15
18	5
19	5
20	0
21	9
22	15
23	3
24	9
25	3
26	3
27	0
28	49
29	21
30	35
31	7
32	21
33	7
34	7
35	0
36	4
37	14
38	6
39	10
40	2
41	6
42	2
43	2
44	0
45	81
46	18
47	63
48	27
49	45
50	9
51	27
52	9
53	9
54	0
55	25
56	45
57	10
58	35
59	15
60	25
61	5
62	15
63	5
64	5
65	0
66	121
67	55
68	99
69	22
70	77
71	33
72	55
73	11
74	33
75	11
76	11
77	0
78	9
79	33
80	15
81	27
82	6
83	21
84	9
85	15
86	3
87	9
88	3
89	3
90	0