A337318 - cp's OEIS frontend

A337318 Total number of nodes summed over all nonnegative lattice paths from (0,0) to (n,0) where the allowed steps at (x,y) are (h,v) with h in {1..max(1,y)} and v in {-1,0,1}.

n	a(n)
0	1
1	2
2	6
3	16
4	45
5	131
6	393
7	1218
8	3887
9	12736
10	42707
11	146113
12	508610
13	1796848
14	6428953
15	23253209
16	84893617
17	312435085
18	1157899672
19	4317354453
20	16183476500
21	60947573729
22	230481995102
23	874810511970
24	3331322503398
25	12723257204883
26	48722782351656
27	187028551724723

[1, 2, 6, 16, 45, 131, 393, 1218, 3887, 12736, 42707, 146113, 508610, 1796848, 6428953, 23253209, 84893617, 312435085, 1157899672, 4317354453, 16183476500, 60947573729, 230481995102, 874810511970, 3331322503398, 12723257204883, 48722782351656, 187028551724723]

cp's OEIS Frontend

A337318 Total number of nodes summed over all nonnegative lattice paths from (0,0) to (n,0) where the allowed steps at (x,y) are (h,v) with h in {1..max(1,y)} and v in {-1,0,1}.

Table of values

List of values