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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 1
1728, 19288, 221512, 2584128, 30171224, 351706460, 4095080272, 47706224548, 556422733920, 6487687918860, 75553828752976, 880154610523828, 10265420092915416, 119691576863205808, 1393902790577666192 (list; graph; refs; listen; history; text; internal format)
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

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Last modified October 26 08:00 EDT 2021. Contains 348267 sequences. (Running on oeis4.)