A240048 Number of 3Xn 0..3 arrays with no element equal to zero plus the sum of elements to its left or zero 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

4, 10, 26, 72, 174, 597, 1187, 3115, 7269, 16520, 39181, 89951, 210684, 483773, 1131924, 2616441, 6047969, 14112456, 32543109, 75591535, 175328537, 405822918, 941534652, 2181820138, 5057085795, 11720944941, 27171466826, 62973901722

Offset

1,1

Comments

Row 3 of A240046

Links

R. H. Hardin, Table of n, a(n) for n = 1..200

R. H. Hardin, Empirical recurrence of order 76

Formula

Empirical recurrence of order 76 (see link above)

Example

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

Crossrefs

Sequence in context: A099234 A087222 A130583 * A105999 A192210 A121494

Adjacent sequences: A240045 A240046 A240047 * A240049 A240050 A240051

Keyword

nonn

Author

R. H. Hardin, Mar 31 2014

Status

approved