A238063 T(n,k)=Number of (n+1)X(k+1) 0..3 arrays with the maximum plus the lower median minus the upper median of every 2X2 subblock differing from its horizontal and vertical neighbors by exactly one

256, 1910, 1910, 14429, 26634, 14429, 109386, 373572, 373572, 109386, 828750, 5318512, 9814274, 5318512, 828750, 6261150, 75397960, 262520800, 262520800, 75397960, 6261150, 47346273, 1065216948, 6977336094, 13354392266, 6977336094

Offset

1,1

Comments

Table starts

.........256..........1910...........14429...........109386...........828750

........1910.........26634..........373572..........5318512.........75397960

.......14429........373572.........9814274........262520800.......6977336094

......109386.......5318512.......262520800......13354392266.....671554527276

......828750......75397960......6977336094.....671554527276...63695813996436

.....6261150....1065216948....184559576240...33609979270956.5998978739140238

....47346273...15062600632...4896168992178.1685585654315194

...358316792..213664795084.130300801140848

..2711887788.3026358430964

.20506077144

Links

R. H. Hardin, Table of n, a(n) for n = 1..60

Formula

Empirical for column k:

k=1: [linear recurrence of order 26]

Example

Some solutions for n=2 k=4
..0..0..0..2..2....0..0..0..2..1....0..0..3..0..1....0..0..2..2..0
..0..1..3..2..2....0..1..1..0..1....0..1..0..2..1....0..0..3..3..2
..0..1..3..1..0....2..3..3..0..2....1..0..2..2..3....1..2..3..0..3

Crossrefs

Sequence in context: A206745 A237791 A237786 * A238058 A235972 A235965

Adjacent sequences: A238060 A238061 A238062 * A238064 A238065 A238066

Keyword

nonn,tabl

Author

R. H. Hardin, Feb 17 2014

Status

approved