A263520 - cp's OEIS frontend

A263520 Number of (2+1) X (n+1) arrays of permutations of 0..n*3+2 filled by rows with each element moved a city block distance of 0 or 1, and rows and columns in increasing lexicographic order.

n	a(n)
1	8
2	35
3	160
4	660
5	2651
6	10350
7	39807
8	151463
9	572454
10	2153977
11	8081566
12	30264786
13	113201857
14	423085492
15	1580453125
16	5901900685
17	22034817900
18	82255893847
19	307033492332
20	1145986101448
21	4277171754383
22	15963330711354
23	59577671664211

[8, 35, 160, 660, 2651, 10350, 39807, 151463, 572454, 2153977, 8081566, 30264786, 113201857, 423085492, 1580453125, 5901900685, 22034817900, 82255893847, 307033492332, 1145986101448, 4277171754383, 15963330711354, 59577671664211]

cp's OEIS Frontend

A263520 Number of (2+1) X (n+1) arrays of permutations of 0..n*3+2 filled by rows with each element moved a city block distance of 0 or 1, and rows and columns in increasing lexicographic order.

Table of values

List of values