A267837 Number of 4Xn arrays containing n copies of 0..4-1 with every element equal to or 1 greater than any northeast neighbor modulo 4 and the upper left element equal to 0.

6, 54, 924, 19696, 456052, 11169884, 284749896, 7478180356, 200946163564, 5498658652872, 152701830225328, 4292791741022352, 121927662325745128, 3493616278749683152, 100864166949775322480, 2931337070411050352250

Offset

1,1

Comments

Row 4 of A267836.

Links

R. H. Hardin, Table of n, a(n) for n = 1..40

Example

Some solutions for n=4
..0..1..2..1....0..2..1..1....0..2..3..1....0..0..1..1....0..3..1..3
..2..3..1..3....2..1..2..3....3..3..1..0....0..1..1..2....0..2..3..1
..0..2..3..0....1..2..0..3....3..2..0..0....2..2..3..3....3..0..1..2
..3..0..1..2....3..0..0..3....2..1..1..2....2..3..3..0....0..2..2..1

Crossrefs

Cf. A267836.

Sequence in context: A217238 A378026 A171681 * A049037 A047681 A075575

Adjacent sequences: A267834 A267835 A267836 * A267838 A267839 A267840

Keyword

nonn

Author

R. H. Hardin, Jan 21 2016

Status

approved