A328281 - cp's OEIS frontend

A328281 Total number of nodes in all n-step walks on cubic lattice starting at (0,0,0), ending at (0,floor(n/2),ceiling(n/2)), remaining in the first (nonnegative) octant and using steps (0,0,1), (0,1,0), (1,0,0), (-1,1,1), (1,-1,1), and (1,1,-1).

n	a(n)
0	1
1	2
2	9
3	28
4	130
5	492
6	2401
7	10056
8	50346
9	224110
10	1141030
11	5284200
12	27222364
13	129582278
14	673340265
15	3270171504
16	17104148290
17	84342959172
18	443406172278
19	2212675109180
20	11680186909062
21	58844537998598
22	311667574680190
23	1582458820299408
24	8404755004516300

[1, 2, 9, 28, 130, 492, 2401, 10056, 50346, 224110, 1141030, 5284200, 27222364, 129582278, 673340265, 3270171504, 17104148290, 84342959172, 443406172278, 2212675109180, 11680186909062, 58844537998598, 311667574680190, 1582458820299408, 8404755004516300]

cp's OEIS Frontend

A328281 Total number of nodes in all n-step walks on cubic lattice starting at (0,0,0), ending at (0,floor(n/2),ceiling(n/2)), remaining in the first (nonnegative) octant and using steps (0,0,1), (0,1,0), (1,0,0), (-1,1,1), (1,-1,1), and (1,1,-1).

Table of values

List of values