A132280 - cp's OEIS frontend

A132280 Triangle read by rows: T(n,k) is the number of paths in the first quadrant from (0,0) to (n,0), consisting of steps U=(1,1), D=(1,-1), h=(1,0) and H=(2,0), having k H steps (0<=k<=floor(n/2)).

n	a(n)
0	1
1	1
2	2
3	1
4	4
5	2
6	9
7	6
8	1
9	21
10	16
11	3
12	51
13	45
14	12
15	1
16	127
17	126
18	40
19	4
20	323
21	357
22	135
23	20
24	1
25	835
26	1016
27	441
28	80
29	5
30	2188
31	2907
32	1428
33	315
34	30
35	1
36	5798
37	8350
38	4572
39	1176
40	140
41	6
42	15511
43	24068
44	14535
45	4284
46	630
47	42
48	1
49	41835
50	69576
51	45925
52	15240
53	2646
54	224
55	7

[1, 1, 2, 1, 4, 2, 9, 6, 1, 21, 16, 3, 51, 45, 12, 1, 127, 126, 40, 4, 323, 357, 135, 20, 1, 835, 1016, 441, 80, 5, 2188, 2907, 1428, 315, 30, 1, 5798, 8350, 4572, 1176, 140, 6, 15511, 24068, 14535, 4284, 630, 42, 1, 41835, 69576, 45925, 15240, 2646, 224, 7]

cp's OEIS Frontend

A132280 Triangle read by rows: T(n,k) is the number of paths in the first quadrant from (0,0) to (n,0), consisting of steps U=(1,1), D=(1,-1), h=(1,0) and H=(2,0), having k H steps (0<=k<=floor(n/2)).

Table of values

List of values