A247326 - cp's OEIS frontend

A247326 Number of paths from (0,0) to (n,3), 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	0
2	2
3	2
4	6
5	10
6	20
7	40
8	74
9	150
10	282
11	558
12	1072
13	2088
14	4050
15	7850
16	15254
17	29562
18	57412
19	111344
20	216106
21	419294
22	813594
23	1578750
24	3063264
25	5944144
26	11533698
27	22380210
28	43426118
29	84263882
30	163505076
31	317263672
32	615616874
33	1194537286
34	2317872890
35	4497581934

[0, 0, 2, 2, 6, 10, 20, 40, 74, 150, 282, 558, 1072, 2088, 4050, 7850, 15254, 29562, 57412, 111344, 216106, 419294, 813594, 1578750, 3063264, 5944144, 11533698, 22380210, 43426118, 84263882, 163505076, 317263672, 615616874, 1194537286, 2317872890, 4497581934]

cp's OEIS Frontend

A247326 Number of paths from (0,0) to (n,3), 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