A264491 - cp's OEIS frontend

A264491 Number of (2+1) X (n+1) arrays of permutations of 0..n*3+2 with each element having directed index change 2,-1 1,0 2,1 0,-1 -2,-2 or -1,0.

n	a(n)
1	3
2	1
3	10
4	8
5	35
6	42
7	130
8	194
9	501
10	849
11	1979
12	3613
13	7942
14	15145
15	32182
16	62953
17	131165
18	260426
19	536438
20	1074379
21	2198378
22	4425274
23	9019904
24	18210519
25	37034259
26	74898261
27	152118445
28	307953916
29	624975597
30	1265962640
31	2568054807
32	5203674585

[3, 1, 10, 8, 35, 42, 130, 194, 501, 849, 1979, 3613, 7942, 15145, 32182, 62953, 131165, 260426, 536438, 1074379, 2198378, 4425274, 9019904, 18210519, 37034259, 74898261, 152118445, 307953916, 624975597, 1265962640, 2568054807, 5203674585]

cp's OEIS Frontend

A264491 Number of (2+1) X (n+1) arrays of permutations of 0..n*3+2 with each element having directed index change 2,-1 1,0 2,1 0,-1 -2,-2 or -1,0.

Table of values

List of values