A121490 - cp's OEIS frontend

A121490 Rectangular array T by antidiagonals: T(n,k) = [y+1]^2-y^2, where y=n*sqrt(k) and [ ] denotes the floor function.

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

[3, 2, 5, 1, 1, 7, 5, 4, 7, 9, 4, 9, 9, 4, 11, 3, 5, 13, 1, 14, 13, 2, 1, 4, 17, 6, 9, 15, 1, 8, 10, 1, 21, 13, 2, 17, 7, 4, 1, 4, 19, 25, 22, 16, 19, 6, 13, 9, 9, 19, 16, 29, 4, 7, 21, 5, 9, 19, 16, 21, 9, 11, 33, 13, 25, 23, 4, 5, 10, 25, 25, 4, 30, 4, 37, 24, 14, 25, 3, 1, 1, 9, 31, 1, 18, 16]

cp's OEIS Frontend

A121490 Rectangular array T by antidiagonals: T(n,k) = [y+1]^2-y^2, where y=n*sqrt(k) and [ ] denotes the floor function.

Table of values

List of values

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

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

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