A238993 Number of nX4 0..3 arrays with no element equal to two plus the sum of elements to its left or two plus the sum of the sum of elements above it, modulo 4

31, 955, 25601, 638779, 15482441, 370847909, 8839918663, 210298050207, 4998886061169, 118785304972327, 2822242684232115, 67050092047403637, 1592922871540500091, 37842951297176471361, 899028950928529166077

Offset

1,1

Comments

Column 4 of A238997

Links

R. H. Hardin, Table of n, a(n) for n = 1..210

Example

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

Crossrefs

Sequence in context: A170750 A218733 A084330 * A171336 A200442 A207777

Adjacent sequences: A238990 A238991 A238992 * A238994 A238995 A238996

Keyword

nonn

Author

R. H. Hardin, Mar 08 2014

Status

approved