A127751 - cp's OEIS frontend

A127751 Inverse of number triangle A(n,k)=if(k<=n,if(n<=2k,1/(3n+1),0),0).

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

[1, 0, 4, 0, -4, 7, 0, 4, -7, 10, 0, 0, 0, -10, 13, 0, -4, 7, 0, -13, 16, 0, 0, 0, 0, 0, -16, 19, 0, 4, -7, 10, 0, 0, -19, 22, 0, 0, 0, 0, 0, 0, 0, -22, 25, 0, 0, 0, -10, 13, 0, 0, 0, -25, 28, 0, 0, 0, 0, 0, 0, 0, 0, 0, -28, 31, 0, -4, 7, 0, -13]

cp's OEIS Frontend

A127751 Inverse of number triangle A(n,k)=if(k<=n,if(n<=2k,1/(3n+1),0),0).

Table of values

List of values

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

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

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