A183840 Number of (n+1)X5 binary arrays with each element of every 2X2 subblock being the sum mod 2 of two others

251, 2297, 21068, 197133, 1839599, 17250758, 161545837, 1514840541, 14197275248, 133112213345, 1247806255067, 11698539778542, 109669818666945, 1028159727064977, 9638825752325984, 90363621330846069, 847148911741824391

Offset

1,1

Comments

Column 4 of A183845

Links

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

Formula

Empirical: a(n)=13*a(n-1)+10*a(n-2)-617*a(n-3)+1477*a(n-4)+7392*a(n-5)-31514*a(n-6)-7224*a(n-7)+177424*a(n-8)-157720*a(n-9)-335288*a(n-10)+534384*a(n-11)+103824*a(n-12)-482816*a(n-13)+109440*a(n-14)+122368*a(n-15)-40960*a(n-16)

Example

Some solutions for 3X5
..0..1..0..0..1....1..0..1..1..0....0..0..0..1..1....1..1..0..1..0
..1..0..1..1..0....0..1..1..0..1....0..0..0..1..0....0..1..1..0..1
..1..0..1..0..1....0..1..0..1..0....1..1..1..0..1....1..0..1..1..0

Crossrefs

Sequence in context: A054800 A033451 A201793 * A340636 A234929 A218639

Adjacent sequences: A183837 A183838 A183839 * A183841 A183842 A183843

Keyword

nonn

Author

R. H. Hardin Jan 07 2011

Status

approved