A239332 - OEIS

A239332

Number of n X n 0..3 arrays with no element equal to one plus the sum of elements to its left or three plus the sum of the elements above it, modulo 4

2, 31, 2187, 790681, 1527488498, 15397080750829, 808844678734652790, 222534953338562308679099, 320707048341323698139814420023

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

COMMENTS

Diagonal of A239340

LINKS

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

EXAMPLE

Some solutions for n=3

..0..2..0....2..0..1....2..2..2....2..0..0....0..2..0....0..2..0....2..1..1

..2..0..0....0..0..2....2..2..0....2..0..2....0..2..0....0..2..0....2..2..2

..2..0..2....2..0..1....0..2..2....0..2..0....0..0..2....0..0..0....0..3..1

CROSSREFS

Sequence in context: A134646 A368354 A197320 * A350940 A244441 A004072

Adjacent sequences: A239329 A239330 A239331 * A239333 A239334 A239335

KEYWORD

nonn

AUTHOR

R. H. Hardin, Mar 16 2014

STATUS

approved