A237490 Number of (n+1)X(2+1) 0..3 arrays with the maximum plus the upper median minus the lower median minus the minimum of every 2X2 subblock differing from its horizontal and vertical neighbors by exactly one

1728, 19288, 221512, 2584128, 30171224, 351706460, 4095080272, 47706224548, 556422733920, 6487687918860, 75553828752976, 880154610523828, 10265420092915416, 119691576863205808, 1393902790577666192

Offset

1,1

Comments

Column 2 of A237494

Links

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

Formula

Empirical: a(n) = 20076*a(n-4) -30963114*a(n-8) +17742299774*a(n-12) -4486150673585*a(n-16) +504677649505566*a(n-20) -29356316158732439*a(n-24) +966060370545963788*a(n-28) -18497168436220523153*a(n-32) +198997625891729725690*a(n-36) -1038614063422502404638*a(n-40) +1078455559202968849160*a(n-44) +9561579193839899167904*a(n-48) -32659993350070324019856*a(n-52) +48397569970373697382656*a(n-56) -40369120219890399840128*a(n-60) +24366820699820541125632*a(n-64) -1366745837841586018304*a(n-68) -11349801641134789099520*a(n-72) +4447227527163548532736*a(n-76) -405271925986135375872*a(n-80) for n>82

Example

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

Crossrefs

Sequence in context: A223236 A017403 A017523 * A223324 A002519 A052068

Adjacent sequences: A237487 A237488 A237489 * A237491 A237492 A237493

Keyword

nonn

Author

R. H. Hardin, Feb 08 2014

Status

approved