A151331 - cp's OEIS frontend

A151331 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, 1), (-1, 0), (0, -1), (0, 1), (1, -1), (1, 0), (1, 1)}.

n	a(n)
0	1
1	3
2	18
3	105
4	684
5	4550
6	31340
7	219555
8	1564080
9	11271876
10	82059768
11	602215614
12	4450146624
13	33076800900
14	247096919784
15	1854031805769
16	13965171795432
17	105550935041552
18	800212396412000
19	6083310009164388
20	46360755048406656
21	354109165968099048
22	2710276234371255888
23	20782807250217463750

[1, 3, 18, 105, 684, 4550, 31340, 219555, 1564080, 11271876, 82059768, 602215614, 4450146624, 33076800900, 247096919784, 1854031805769, 13965171795432, 105550935041552, 800212396412000, 6083310009164388, 46360755048406656, 354109165968099048, 2710276234371255888, 20782807250217463750]

cp's OEIS Frontend

A151331 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, 1), (-1, 0), (0, -1), (0, 1), (1, -1), (1, 0), (1, 1)}.

Table of values

List of values