A271848 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 4-1 elements moved to themselves.

1, 3, 22, 304, 11246, 932092, 170786194, 70031967880, 63448846953258, 128002469163212148

Offset

1,2

Comments

Column 4 of A271852.

Links

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

Example

Some solutions for n=4
.....0........0........6........6........0........5........6........6
....4.6......5.0......2.3......2.3......4.6......6.1......2.3......2.5
...6.1.3....5.1.3....4.4.5....0.6.3....2.5.3....5.2.5....6.0.5....6.1.5
..2.3.0.0..4.4.2.0..0.1.3.0..0.0.4.1..2.3.0.0..4.1.4.1..2.3.4.1..2.3.4.1
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: A298693 A326430 A119390 * A144681 A305963 A366204

Adjacent sequences: A271845 A271846 A271847 * A271849 A271850 A271851

Keyword

nonn

Author

R. H. Hardin, Apr 15 2016

Status

approved