A267971 Number of nX3 0..3 arrays with every repeated value in every row greater than or equal to, and in every column greater than, the previous repeated value.

64, 4096, 216000, 10941048, 519718464, 23689358848, 1040125019968, 44297983526887, 1837365396992000, 74486671360299008, 2959536976199968256, 115510695146966939968, 4436989542752316253696, 167999383203780355895296

Offset: 1

Author

R. H. Hardin, Jan 23 2016

Keywords

• nonn

Comments

Column 3 of A267974.

Examples

			Some solutions for n=2
..0..3..2....0..1..2....2..1..3....3..2..3....3..2..1....2..3..0....3..1..3
..0..3..2....1..1..0....3..2..3....2..0..1....3..1..2....3..3..1....1..0..0
		

Links

• R. H. Hardin, Table of n, a(n) for n = 1..210
• R. H. Hardin, Empirical recurrence of order 40

Crossrefs

Cf. A267974.

Formula

Empirical recurrence of order 40 (see link above)