A132887 - cp's OEIS frontend

A132887 Number of symmetric 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).

n	a(n)
0	1
1	1
2	3
3	2
4	8
5	6
6	23
7	17
8	68
9	51
10	205
11	154
12	627
13	473
14	1937
15	1464
16	6032
17	4568
18	18900
19	14332
20	59519
21	45187
22	188211
23	143024
24	597241
25	454217
26	1900821
27	1446604
28	6065180
29	4618576
30	19396027

[1, 1, 3, 2, 8, 6, 23, 17, 68, 51, 205, 154, 627, 473, 1937, 1464, 6032, 4568, 18900, 14332, 59519, 45187, 188211, 143024, 597241, 454217, 1900821, 1446604, 6065180, 4618576, 19396027]

cp's OEIS Frontend

A132887 Number of symmetric 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).

Table of values

List of values