A338721 - cp's OEIS frontend

A338721 Irregular triangle read by rows: T(n,k), n >= 1, k >= 1, in which column k lists the odd numbers k times, and the first element of column k is in row k(k+1)/2.

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

[1, 3, 5, 1, 7, 1, 9, 3, 11, 3, 1, 13, 5, 1, 15, 5, 1, 17, 7, 3, 19, 7, 3, 1, 21, 9, 3, 1, 23, 9, 5, 1, 25, 11, 5, 1, 27, 11, 5, 3, 29, 13, 7, 3, 1, 31, 13, 7, 3, 1, 33, 15, 7, 3, 1, 35, 15, 9, 5, 1, 37, 17, 9, 5, 1, 39, 17, 9, 5, 3, 41, 19, 11, 5, 3, 1, 43, 19, 11, 7, 3, 1]

cp's OEIS Frontend

A338721 Irregular triangle read by rows: T(n,k), n >= 1, k >= 1, in which column k lists the odd numbers k times, and the first element of column k is in row k(k+1)/2.

Table of values

List of values

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

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

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