A290262 - cp's OEIS frontend

A290262 Irregular triangle read by rows: rows give the (negated) nonzero coefficients of t in each term of the inverse power product expansion of 1 - t * x/(1-x).

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

[1, 1, 1, 1, 1, 1, 2, 2, 1, 1, 2, 2, 1, 1, 3, 4, 2, 1, 3, 5, 5, 3, 1, 1, 4, 9, 13, 13, 9, 4, 1, 1, 4, 9, 13, 13, 9, 4, 1, 1, 5, 14, 25, 30, 24, 12, 3, 1, 5, 15, 30, 42, 42, 30, 15, 5, 1, 1, 6, 21, 48, 75, 81, 60, 30, 10, 2]

cp's OEIS Frontend

A290262 Irregular triangle read by rows: rows give the (negated) nonzero coefficients of t in each term of the inverse power product expansion of 1 - t * x/(1-x).

Table of values

List of values

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

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

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