A231345 - cp's OEIS frontend

A231345 Triangle read by rows: T(n,k), n>=1, k>=1, in which column k lists the odd numbers interleaved with k-1 zeros but T(n,1) = -1 and the first element of column k is in row k(k+1)/2.

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

[-1, -1, -1, 1, -1, 0, -1, 3, -1, 0, 1, -1, 5, 0, -1, 0, 0, -1, 7, 3, -1, 0, 0, 1, -1, 9, 0, 0, -1, 0, 5, 0, -1, 11, 0, 0, -1, 0, 0, 3, -1, 13, 7, 0, 1, -1, 0, 0, 0, 0, -1, 15, 0, 0, 0, -1, 0, 9, 5, 0, -1, 17, 0, 0, 0, -1, 0, 0, 0, 3, -1, 19, 11, 0, 0, 1]

cp's OEIS Frontend

A231345 Triangle read by rows: T(n,k), n>=1, k>=1, in which column k lists the odd numbers interleaved with k-1 zeros but T(n,1) = -1 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	-1
3	-1
4	1
5	-1
6	0
7	-1
8	3
9	-1
10	0
11	1
12	-1
13	5
14	0
15	-1
16	0
17	0
18	-1
19	7
20	3
21	-1
22	0
23	0
24	1
25	-1
26	9
27	0
28	0
29	-1
30	0
31	5
32	0
33	-1
34	11
35	0
36	0
37	-1
38	0
39	0
40	3
41	-1
42	13
43	7
44	0
45	1
46	-1
47	0
48	0
49	0
50	0
51	-1
52	15
53	0
54	0
55	0
56	-1
57	0
58	9
59	5
60	0
61	-1
62	17
63	0
64	0
65	0
66	-1
67	0
68	0
69	0
70	3
71	-1
72	19
73	11
74	0
75	0
76	1

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

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