A271849 Number of ways to move elements of an nXnXn triangular array to themselves or a neighbor, with no 2-cycles and with no more than 5-1 elements moved to themselves.

1, 3, 22, 384, 15536, 1473994, 314196428, 149466458074, 157014841181820, 365217955668529232

Offset

1,2

Comments

Column 5 of A271852.

Links

Table of n, a(n) for n=1..10.

Example

Some solutions for n=4
.....0........5........0........0........0........0........0........0
....6.3......5.1......6.3......6.3......4.5......5.3......4.5......6.3
...5.6.1....5.4.1....6.2.5....5.2.0....6.1.5....5.0.1....2.6.0....5.2.5
..4.1.2.0..4.4.1.0..2.3.4.1..4.1.0.0..2.3.4.1..4.4.2.0..2.3.3.0..4.1.4.1
Element moves: 0=itself 1=nw 2=ne 3=w 4=e 5=sw 6=se, reciprocals total 7

Crossrefs

Cf. A271852.

Sequence in context: A259919 A275366 A196734 * A271850 A364844 A156512

Adjacent sequences: A271846 A271847 A271848 * A271850 A271851 A271852

Keyword

nonn

Author

R. H. Hardin, Apr 15 2016

Status

approved