A151290 - cp's OEIS frontend

A151290 Number of walks within N^2 (the first quadrant of Z^2) starting at (0,0) and consisting of n steps taken from {(-1, 0), (0, -1), (0, 1), (1, 1)}.

n	a(n)
0	1
1	2
2	7
3	23
4	82
5	297
6	1092
7	4074
8	15316
9	57993
10	220913
11	845017
12	3245513
13	12504416
14	48308973
15	187089688
16	726028123
17	2822654120
18	10991682069
19	42864045010
20	167373921420
21	654315764945
22	2560630856073
23	10030570526492
24	39326590305594
25	154311641356522
26	605946719764108
27	2381052954112297

[1, 2, 7, 23, 82, 297, 1092, 4074, 15316, 57993, 220913, 845017, 3245513, 12504416, 48308973, 187089688, 726028123, 2822654120, 10991682069, 42864045010, 167373921420, 654315764945, 2560630856073, 10030570526492, 39326590305594, 154311641356522, 605946719764108, 2381052954112297]

cp's OEIS Frontend

A151290 Number of walks within N^2 (the first quadrant of Z^2) starting at (0,0) and consisting of n steps taken from {(-1, 0), (0, -1), (0, 1), (1, 1)}.

Table of values

List of values