A264054 - cp's OEIS frontend

A264054 Number of (n+1) X (2+1) arrays of permutations of 0..n*3+2 with each element having index change +-(.,.) 0,0 1,2 or 2,-2.

n	a(n)
1	2
2	8
3	18
4	45
5	125
6	320
7	832
8	2197
9	5733
10	14994
11	39304
12	102850
13	269225
14	704969
15	1845504
16	4831488
17	12649337
18	33116057
19	86698690
20	226981000
21	594243090
22	1555747893
23	4073003173
24	10663258432
25	27916771136
26	73087061741
27	191344405725

[2, 8, 18, 45, 125, 320, 832, 2197, 5733, 14994, 39304, 102850, 269225, 704969, 1845504, 4831488, 12649337, 33116057, 86698690, 226981000, 594243090, 1555747893, 4073003173, 10663258432, 27916771136, 73087061741, 191344405725]

cp's OEIS Frontend

A264054 Number of (n+1) X (2+1) arrays of permutations of 0..n*3+2 with each element having index change +-(.,.) 0,0 1,2 or 2,-2.

Table of values

List of values