A151318 - cp's OEIS frontend

A151318 Number of walks within N^2 (the first quadrant of Z^2) starting at (0,0) and consisting of n steps taken from {(-1, 1), (-1, 0), (0, 1), (1, 0), (1, 1)}.

n	a(n)
0	1
1	3
2	13
3	55
4	249
5	1131
6	5253
7	24543
8	115825
9	549331
10	2620029
11	12543367
12	60270697
13	290423355
14	1403088885
15	6793370415
16	32956254945
17	160152588195
18	779470975725
19	3798948989655
20	18538237315545
21	90565618791435
22	442899758973285
23	2167985089576575
24	10621425660150609
25	52078139149834611
26	255533719072119133

[1, 3, 13, 55, 249, 1131, 5253, 24543, 115825, 549331, 2620029, 12543367, 60270697, 290423355, 1403088885, 6793370415, 32956254945, 160152588195, 779470975725, 3798948989655, 18538237315545, 90565618791435, 442899758973285, 2167985089576575, 10621425660150609, 52078139149834611, 255533719072119133]

cp's OEIS Frontend

A151318 Number of walks within N^2 (the first quadrant of Z^2) starting at (0,0) and consisting of n steps taken from {(-1, 1), (-1, 0), (0, 1), (1, 0), (1, 1)}.

Table of values

List of values