A132885 - cp's OEIS frontend

A132885 Triangle read by rows: T(n,k) is the number of paths in the right half-plane 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=(2,0) steps (0 <= k <= floor(n/2)).

n	a(n)
0	1
1	1
2	3
3	1
4	7
5	2
6	19
7	9
8	1
9	51
10	28
11	3
12	141
13	95
14	18
15	1
16	393
17	306
18	70
19	4
20	1107
21	987
22	285
23	30
24	1
25	3139
26	3144
27	1071
28	140
29	5
30	8953
31	9963
32	3948
33	665
34	45
35	1
36	25653
37	31390
38	14148
39	2856
40	245
41	6
42	73789
43	98483
44	49815
45	11844
46	1330
47	63
48	1
49	212941
50	307836
51	172645
52	47160

[1, 1, 3, 1, 7, 2, 19, 9, 1, 51, 28, 3, 141, 95, 18, 1, 393, 306, 70, 4, 1107, 987, 285, 30, 1, 3139, 3144, 1071, 140, 5, 8953, 9963, 3948, 665, 45, 1, 25653, 31390, 14148, 2856, 245, 6, 73789, 98483, 49815, 11844, 1330, 63, 1, 212941, 307836, 172645, 47160]

cp's OEIS Frontend

A132885 Triangle read by rows: T(n,k) is the number of paths in the right half-plane 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=(2,0) steps (0 <= k <= floor(n/2)).

Table of values

List of values