A241400 Number of 4Xn 0..3 arrays with no element equal to zero plus the sum of elements to its left or one plus the sum of the elements above it or zero plus the sum of the elements diagonally to its northwest or one plus the sum of the elements antidiagonally to its northeast, modulo 4

7, 28, 97, 480, 1657, 8697, 31654, 92204, 397955, 1440202, 5015494, 20114505, 70074714, 258768285, 999131434, 3471187281, 13084431710, 49495338616, 176036491899, 662243630484, 2450968267032, 8911921597230, 33375847400152

Offset

1,1

Comments

Row 4 of A241397

Links

R. H. Hardin, Table of n, a(n) for n = 1..136

Example

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

Crossrefs

Sequence in context: A022572 A193654 A356038 * A219411 A224404 A370487

Adjacent sequences: A241397 A241398 A241399 * A241401 A241402 A241403

Keyword

nonn

Author

R. H. Hardin, Apr 20 2014

Status

approved