A271140 Number of nXnXn triangular 0..5 arrays with new values introduced in sequential zero-upwards order and exactly one 2x2x2 triangle having values all different.

0, 1, 56, 4899, 797680, 269282132, 197805084468, 321887622195271, 1163415729672643756

Offset

1,3

Comments

Column 5 of A271141.

Links

Table of n, a(n) for n=1..9.

Example

Some solutions for n=4
.....0........0........0........0........0........0........0........0
....1.2......0.1......0.0......1.0......1.2......1.0......1.0......1.0
...3.1.1....2.1.1....0.1.0....0.1.2....1.2.1....2.1.0....1.1.1....0.0.2
..1.1.1.1..2.1.1.3..1.1.2.0..1.1.2.0..3.1.1.4..1.1.1.2..1.2.2.3..2.0.1.1

Crossrefs

Cf. A271141.

Sequence in context: A049033 A271138 A271139 * A278324 A009600 A278777

Adjacent sequences: A271137 A271138 A271139 * A271141 A271142 A271143

Keyword

nonn

Author

R. H. Hardin, Mar 31 2016

Status

approved