A292361 - cp's OEIS frontend

A292361 The number of paths of length 2m in the plane, starting and ending at (0,1), with unit steps in the four directions (north, east, south, west) and staying in the region y > 0 or x > -y.

n	a(n)
0	1
1	3
2	21
3	192
4	2009
5	22818
6	273895
7	3421318
8	44042729
9	580473551
10	7796745921
11	106365396629
12	1470068855112
13	20543335134692
14	289818595800636
15	4122517765350669
16	59066177091706608

[1, 3, 21, 192, 2009, 22818, 273895, 3421318, 44042729, 580473551, 7796745921, 106365396629, 1470068855112, 20543335134692, 289818595800636, 4122517765350669, 59066177091706608]

cp's OEIS Frontend

A292361 The number of paths of length 2m in the plane, starting and ending at (0,1), with unit steps in the four directions (north, east, south, west) and staying in the region y > 0 or x > -y.

Table of values

List of values