A201949 - cp's OEIS frontend

A201949 Triangle, read by rows, where the g.f. of row n equals Product_{k=0..n-1} (1 + k*y + y^2) for n>0 with a single '1' in row 0.

n	a(n)
0	1
1	1
2	0
3	1
4	1
5	1
6	2
7	1
8	1
9	1
10	3
11	5
12	6
13	5
14	3
15	1
16	1
17	6
18	15
19	24
20	28
21	24
22	15
23	6
24	1
25	1
26	10
27	40
28	90
29	139
30	160
31	139
32	90
33	40
34	10
35	1
36	1
37	15
38	91
39	300
40	629
41	945
42	1078
43	945
44	629
45	300
46	91
47	15
48	1
49	1
50	21
51	182
52	861
53	2520
54	5019
55	7377
56	8358
57	7377
58	5019
59	2520
60	861
61	182
62	21
63	1
64	1
65	28
66	330
67	2156
68	8729
69	23520
70	45030
71	65016
72	73260
73	65016

[1, 1, 0, 1, 1, 1, 2, 1, 1, 1, 3, 5, 6, 5, 3, 1, 1, 6, 15, 24, 28, 24, 15, 6, 1, 1, 10, 40, 90, 139, 160, 139, 90, 40, 10, 1, 1, 15, 91, 300, 629, 945, 1078, 945, 629, 300, 91, 15, 1, 1, 21, 182, 861, 2520, 5019, 7377, 8358, 7377, 5019, 2520, 861, 182, 21, 1, 1, 28, 330, 2156, 8729, 23520, 45030, 65016, 73260, 65016]

cp's OEIS Frontend

A201949 Triangle, read by rows, where the g.f. of row n equals Product_{k=0..n-1} (1 + k*y + y^2) for n>0 with a single '1' in row 0.

Table of values

List of values