A122896 - cp's OEIS frontend

A122896 Riordan array (1, (1 - x - sqrt(1 - 2x - 3x^2)) / (2*x)), a Riordan array for directed animals. Triangle read by rows.

n	a(n)
0	1
1	0
2	1
3	0
4	1
5	1
6	0
7	2
8	2
9	1
10	0
11	4
12	5
13	3
14	1
15	0
16	9
17	12
18	9
19	4
20	1
21	0
22	21
23	30
24	25
25	14
26	5
27	1
28	0
29	51
30	76
31	69
32	44
33	20
34	6
35	1
36	0
37	127
38	196
39	189
40	133
41	70
42	27
43	7
44	1
45	0
46	323
47	512
48	518
49	392
50	230
51	104
52	35
53	8
54	1
55	0
56	835
57	1353
58	1422
59	1140
60	726
61	369
62	147
63	44
64	9
65	1

[1, 0, 1, 0, 1, 1, 0, 2, 2, 1, 0, 4, 5, 3, 1, 0, 9, 12, 9, 4, 1, 0, 21, 30, 25, 14, 5, 1, 0, 51, 76, 69, 44, 20, 6, 1, 0, 127, 196, 189, 133, 70, 27, 7, 1, 0, 323, 512, 518, 392, 230, 104, 35, 8, 1, 0, 835, 1353, 1422, 1140, 726, 369, 147, 44, 9, 1]

cp's OEIS Frontend

A122896 Riordan array (1, (1 - x - sqrt(1 - 2x - 3x^2)) / (2*x)), a Riordan array for directed animals. Triangle read by rows.

Table of values

List of values

cp's OEIS Frontend

A122896 Riordan array (1, (1 - x - sqrt(1 - 2*x - 3*x^2)) / (2*x)), a Riordan array for directed animals. Triangle read by rows.

Table of values

List of values

A122896 Riordan array (1, (1 - x - sqrt(1 - 2x - 3x^2)) / (2*x)), a Riordan array for directed animals. Triangle read by rows.