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A198449 Number of 2nX6 0..2 arrays with values 0..2 introduced in row major order and each element unequal to exactly two horizontal and vertical neighbors 1
71, 1399, 26704, 421185, 7302285, 128955464, 2298267371, 41395566911, 751621555932, 13730905146849, 252013755082625, 4641945567249588, 85732037231734899, 1586580667067965067, 29406033308587639544 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 3 of A198452

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..158

FORMULA

Empirical: a(n) = 43*a(n-1) -546*a(n-2) +629*a(n-3) +19215*a(n-4) +100918*a(n-5) -1416287*a(n-6) -3942531*a(n-7) +14859559*a(n-8) +311775418*a(n-9) +204699855*a(n-10) -5738188157*a(n-11) -40025845283*a(n-12) +44885770480*a(n-13) +713586597059*a(n-14) +3221634786319*a(n-15) -4929025097494*a(n-16) -52942849506157*a(n-17) -215941860150229*a(n-18) +235511756636244*a(n-19) +1620072859762860*a(n-20) +12664128788798586*a(n-21) +22260539391587028*a(n-22) +19256968801657144*a(n-23) -813817452081023144*a(n-24) -2690484221382736120*a(n-25) -6577929807882893744*a(n-26) +43266168981695299728*a(n-27) +191784380387967847616*a(n-28) +386163448945201510272*a(n-29) -2140494998243805237280*a(n-30) -8164630371586556655296*a(n-31) -15082251215185353695360*a(n-32) +84652295657520584990336*a(n-33) +291303322731197552361088*a(n-34) +372400436523112863508480*a(n-35) -3088545268142032746631680*a(n-36) -6867335120850081878224384*a(n-37) -3547388624515809816645632*a(n-38) +62310589312430487859589120*a(n-39) +100758236870682799506509824*a(n-40) +289042196633717617808719872*a(n-41) -584040797656937301860917248*a(n-42) -4706376317605905899106729984*a(n-43) -11242723592605067567949774848*a(n-44) +25825708293671907310760525824*a(n-45) +145518882514167235202684452864*a(n-46) +37124426816655978018310455296*a(n-47) -643174650185426822294476292096*a(n-48) -1569243392237691519784841510912*a(n-49) +1246609779989941442804493320192*a(n-50) +1659325321037392353156830068736*a(n-51) +18106873976716169792051392544768*a(n-52) +15912426216579185293611671486464*a(n-53) +11619663362074426451983773728768*a(n-54) -419112060778263203847534404435968*a(n-55) -71533515929909397346012639526912*a(n-56) +682191387720728914030808369463296*a(n-57) +3566635506947417925376828569026560*a(n-58) -5251618981640212399867968377323520*a(n-59) -1773643323261000344023791185166336*a(n-60) -5765801936638157055357816649285632*a(n-61) +37369663289544299761278547941916672*a(n-62) -71344469942775463267593955234021376*a(n-63) +64800208187195647665821654016065536*a(n-64) -67000258633353331476338191311568896*a(n-65) +252375826091144348125468547547660288*a(n-66) -457040609239187945041749041729241088*a(n-67) +645799442783649156455663581031038976*a(n-68) -1222702210996896147140103858231967744*a(n-69) +1169271517660351888027339630491729920*a(n-70) +617299853859681375883241511266025472*a(n-71) -2375705061902550744858436128869449728*a(n-72) +1833883849486974959721103126637314048*a(n-73) +1814472902124910195978483249180573696*a(n-74) -5647498561856480293532777218658271232*a(n-75) +3400268647455491496279565224642609152*a(n-76) +1879303106105817789434982720371425280*a(n-77) -1916387794881450973801674501018091520*a(n-78)

EXAMPLE

Some solutions for n=4

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

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

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

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

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

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

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

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

CROSSREFS

Sequence in context: A267475 A241940 A254872 * A093271 A201608 A225741

Adjacent sequences:  A198446 A198447 A198448 * A198450 A198451 A198452

KEYWORD

nonn

AUTHOR

R. H. Hardin Oct 25 2011

STATUS

approved

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Last modified May 22 04:38 EDT 2022. Contains 353933 sequences. (Running on oeis4.)