A276903 - cp's OEIS frontend

A276903 Number of positive walks with n steps {-2,-1,0,1,2} starting at the origin, ending at altitude 2, and staying strictly above the x-axis.

n	a(n)
0	0
1	1
2	2
3	7
4	25
5	96
6	382
7	1567
8	6575
9	28096
10	121847
11	534953
12	2373032
13	10619922
14	47890013
15	217395690
16	992640367
17	4555957948
18	21007405327
19	97266928685
20	452046424465
21	2108022305795
22	9860773604035
23	46256877824220
24	217555982625385
25	1025667805621986
26	4846240583558277

[0, 1, 2, 7, 25, 96, 382, 1567, 6575, 28096, 121847, 534953, 2373032, 10619922, 47890013, 217395690, 992640367, 4555957948, 21007405327, 97266928685, 452046424465, 2108022305795, 9860773604035, 46256877824220, 217555982625385, 1025667805621986, 4846240583558277]

cp's OEIS Frontend

A276903 Number of positive walks with n steps {-2,-1,0,1,2} starting at the origin, ending at altitude 2, and staying strictly above the x-axis.

Table of values

List of values