A235977 Number of (n+1)X(4+1) 0..2 arrays with the upper median equal to the lower median in every 2X2 subblock

3741, 89555, 1947197, 46727365, 1101519021, 26513929449, 636000634655, 15322368309233, 368889441554023, 8889119296332995, 214171250506380939, 5161137430892686227, 124370527249999193137, 2997137255815847180323

Offset

1,1

Comments

Column 4 of A235981

Links

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

R. H. Hardin, Empirical recurrence of order 61

Formula

Empirical recurrence of order 61 (see link above)

Example

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

Crossrefs

Sequence in context: A020410 A166262 A340403 * A235243 A368589 A180974

Adjacent sequences: A235974 A235975 A235976 * A235978 A235979 A235980

Keyword

nonn

Author

R. H. Hardin, Jan 17 2014

Status

approved