A247354 - cp's OEIS frontend

A247354 Number of paths from (0,1) to (n,0), with vertices (i,k) satisfying 0 <= k <= 3, consisting of segments given by the vectors (1,1), (1,2), (1,-1).

n	a(n)
0	0
1	1
2	0
3	2
4	2
5	5
6	10
7	17
8	38
9	66
10	138
11	257
12	508
13	981
14	1900
15	3702
16	7154
17	13925
18	26966
19	52381
20	101594
21	197150
22	382578
23	742257
24	1440440
25	2794777
26	5423256
27	10522954
28	20418882
29	39620597
30	76879298
31	149176601
32	289460206
33	561667802
34	1089854522
35	2114747217

[0, 1, 0, 2, 2, 5, 10, 17, 38, 66, 138, 257, 508, 981, 1900, 3702, 7154, 13925, 26966, 52381, 101594, 197150, 382578, 742257, 1440440, 2794777, 5423256, 10522954, 20418882, 39620597, 76879298, 149176601, 289460206, 561667802, 1089854522, 2114747217]

cp's OEIS Frontend

A247354 Number of paths from (0,1) to (n,0), with vertices (i,k) satisfying 0 <= k <= 3, consisting of segments given by the vectors (1,1), (1,2), (1,-1).

Table of values

List of values