A271681 Number of ways to move elements of an nXnXn triangular array to themselves or a neighbor, with no more than 5-1 elements moved to themselves.

1, 6, 60, 1939, 139023, 25765212, 11078521995, 11498758930720, 28198545925392908, 165452583814243981520

Offset

1,2

Comments

Column 5 of A271684.

Links

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

Example

Some solutions for n=4
.....0........5........6........5........5........0........5........0
....0.5......2.0......5.1......4.1......5.1......5.0......6.1......6.6
...0.5.1....6.0.0....4.1.6....0.5.3....4.2.5....2.6.6....6.4.1....2.2.5
..0.4.4.1..2.3.4.3..4.3.0.1..0.4.4.1..0.0.4.1..0.0.1.1..0.1.0.0..0.1.3.0
Element moves: 0=itself 1=nw 2=ne 3=w 4=e 5=sw 6=se, reciprocals total 7

Crossrefs

Cf. A271684.

Sequence in context: A329319 A351165 A003267 * A010574 A363789 A271682

Adjacent sequences: A271678 A271679 A271680 * A271682 A271683 A271684

Keyword

nonn

Author

R. H. Hardin, Apr 12 2016

Status

approved