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A184376 T(n,k)=1/3 the number of (n+1)X(k+1) 0..2 arrays with every 2X2 subblock having at least two equal elements connected horizontally or vertically 10
21, 153, 153, 1107, 2755, 1107, 8019, 49235, 49235, 8019, 58077, 880781, 2167173, 880781, 58077, 420633, 15754461, 95528423, 95528423, 15754461, 420633, 3046491, 281803871, 4210059673, 10378244309, 4210059673, 281803871, 3046491, 22064643 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Table starts

.........21............153...............1107....................8019

........153...........2755..............49235..................880781

.......1107..........49235............2167173................95528423

.......8019.........880781...........95528423.............10378244309

......58077.......15754461.........4210059673...........1127256514575

.....420633......281803871.......185547841629.........122443114867993

....3046491.....5040682279......8177524177277.......13299774554091575

...22064643....90163722073....360402692568245.....1444622701339019869

..159806277..1612776998193..15883791500540967...156915034606615850427

.1157419449.28848073268443.700035935394350709.17044123945719790186817

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..144

EXAMPLE

Some solutions for 4X3 with a(1,1)=0

..0..2..0....0..0..2....0..2..1....0..2..1....0..1..0....0..1..2....0..1..0

..0..0..0....0..0..2....0..0..1....0..0..1....2..1..0....0..1..0....2..2..2

..2..0..1....2..2..2....1..2..1....2..2..1....0..1..1....0..2..2....0..1..2

..2..0..2....1..0..0....1..0..1....2..2..1....1..1..2....1..2..0....1..1..0

CROSSREFS

Sequence in context: A219599 A221694 A229262 * A184368 A078396 A301883

Adjacent sequences: A184373 A184374 A184375 * A184377 A184378 A184379

KEYWORD

nonn,tabl

AUTHOR

R. H. Hardin Jan 12 2011

STATUS

approved

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Last modified November 30 19:14 EST 2022. Contains 358453 sequences. (Running on oeis4.)