A127617 - cp's OEIS frontend

A127617 Number of walks from (0,0) to (n,n) in the region 0 <= x-y <= 3 with the steps (1,0), (0, 1), (2,0) and (0,2).

n	a(n)
0	1
1	1
2	5
3	22
4	92
5	395
6	1684
7	7189
8	30685
9	130973
10	559038
11	2386160
12	10184931
13	43472696
14	185556025
15	792015257
16	3380586357
17	14429474710
18	61589830404
19	262886022219
20	1122085581740
21	4789437042413
22	20442921249973
23	87257234103245
24	372443097062686
25	1589711867161816

[1, 1, 5, 22, 92, 395, 1684, 7189, 30685, 130973, 559038, 2386160, 10184931, 43472696, 185556025, 792015257, 3380586357, 14429474710, 61589830404, 262886022219, 1122085581740, 4789437042413, 20442921249973, 87257234103245, 372443097062686, 1589711867161816]

cp's OEIS Frontend

A127617 Number of walks from (0,0) to (n,n) in the region 0 <= x-y <= 3 with the steps (1,0), (0, 1), (2,0) and (0,2).

Table of values

List of values