A214901 Number of nXnXn triangular 0..3 arrays with every horizontal row nondecreasing and having the same average value

4, 6, 14, 50, 242, 1682, 13442, 134402, 1612802, 22579202, 361267202, 6864076802, 144145612802, 3459494707202, 93406357094402, 2802190712832002, 92472293523456002, 3421474860367872002, 136858994414714880002

Offset

1,1

Comments

Column 3 of A214906

Links

R. H. Hardin, Table of n, a(n) for n = 1..89

Example

Some solutions for n=4
.....1........1........1........2........1........2........1........1
....1.1......1.1......0.2......2.2......0.2......2.2......0.2......1.1
...1.1.1....0.1.2....0.0.3....0.3.3....0.0.3....1.2.3....0.1.2....1.1.1
..0.1.1.2..0.1.1.2..0.1.1.2..0.2.3.3..1.1.1.1..0.2.3.3..0.0.2.2..0.0.2.2

Crossrefs

Sequence in context: A277059 A096003 A114058 * A357808 A365074 A284123

Adjacent sequences: A214898 A214899 A214900 * A214902 A214903 A214904

Keyword

nonn

Author

R. H. Hardin Jul 29 2012

Status

approved