A151347 - cp's OEIS frontend

A151347 Number of walks within N^2 (the first quadrant of Z^2) starting and ending at (0,0) and consisting of n steps taken from {(-1, 0), (-1, 1), (0, -1), (0, 1), (1, -1)}.

n	a(n)
0	1
1	0
2	1
3	1
4	3
5	8
6	19
7	65
8	177
9	611
10	1928
11	6648
12	22928
13	80851
14	292343
15	1063611
16	3957406
17	14818681
18	56339994
19	215943994
20	836246604
21	3265240671
22	12848804154
23	50936668789
24	203235590343
25	816070826188
26	3295317218038
27	13379003847708
28	54588942258042
29	223782828113783
30	921414594957514
31	3809576782931810

[1, 0, 1, 1, 3, 8, 19, 65, 177, 611, 1928, 6648, 22928, 80851, 292343, 1063611, 3957406, 14818681, 56339994, 215943994, 836246604, 3265240671, 12848804154, 50936668789, 203235590343, 816070826188, 3295317218038, 13379003847708, 54588942258042, 223782828113783, 921414594957514, 3809576782931810]

cp's OEIS Frontend

A151347 Number of walks within N^2 (the first quadrant of Z^2) starting and ending at (0,0) and consisting of n steps taken from {(-1, 0), (-1, 1), (0, -1), (0, 1), (1, -1)}.

Table of values

List of values