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A208499 Number of nX6 0..1 arrays avoiding 0 0 0 and 0 0 1 horizontally and 0 1 0 and 1 1 1 vertically 1
26, 676, 756, 2124, 4992, 12654, 33488, 79376, 214560, 539792, 1340052, 3550932, 8928264, 22884596, 58320710, 150426976, 386485092, 969138898, 2534260860, 6476490918, 16314573968, 42371558268, 108544182448, 275738199040 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 6 of A208501

LINKS

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

FORMULA

Empirical: a(n) = 40*a(n-3) +5*a(n-4) -750*a(n-6) +25*a(n-7) -2*a(n-8) +8770*a(n-9) -1800*a(n-10) +27*a(n-11) -71804*a(n-12) +20884*a(n-13) -270*a(n-14) +438312*a(n-15) -125610*a(n-16) +8772*a(n-17) -2075450*a(n-18) +475416*a(n-19) -81530*a(n-20) +7828412*a(n-21) -1239230*a(n-22) +329284*a(n-23) -24008186*a(n-24) +2366628*a(n-25) -465682*a(n-26) +60821718*a(n-27) -3325577*a(n-28) -1056230*a(n-29) -128920264*a(n-30) +2204526*a(n-31) +5591281*a(n-32) +230814746*a(n-33) +6933222*a(n-34) -8857319*a(n-35) -351485754*a(n-36) -35427722*a(n-37) +162691*a(n-38) +458413281*a(n-39) +92430042*a(n-40) +25081772*a(n-41) -516087411*a(n-42) -168948739*a(n-43) -53720714*a(n-44) +505174901*a(n-45) +232633694*a(n-46) +64974873*a(n-47) -432082685*a(n-48) -248321033*a(n-49) -52394241*a(n-50) +323201610*a(n-51) +207584446*a(n-52) +28788324*a(n-53) -210800191*a(n-54) -135560985*a(n-55) -10274177*a(n-56) +119512732*a(n-57) +67908102*a(n-58) +2124800*a(n-59) -58912900*a(n-60) -24652122*a(n-61) -384905*a(n-62) +25259057*a(n-63) +5309091*a(n-64) +359998*a(n-65) -9355555*a(n-66) +187051*a(n-67) -293029*a(n-68) +2955797*a(n-69) -675912*a(n-70) +136094*a(n-71) -788429*a(n-72) +294987*a(n-73) -38876*a(n-74) +174689*a(n-75) -73565*a(n-76) +6454*a(n-77) -31100*a(n-78) +11210*a(n-79) -450*a(n-80) +4307*a(n-81) -910*a(n-82) -8*a(n-83) -446*a(n-84) +15*a(n-85) -a(n-86) +30*a(n-87) +2*a(n-88) -a(n-90) for n>92

EXAMPLE

Some solutions for n=4

..0..1..0..1..1..0....0..1..0..1..1..1....0..1..0..1..0..0....0..1..0..1..0..1

..1..0..1..1..0..1....1..0..1..0..1..1....0..1..1..0..1..1....0..1..0..1..0..0

..1..0..1..0..1..1....1..0..1..1..0..0....1..0..1..0..1..1....1..0..1..0..1..1

..0..1..0..1..1..0....0..1..0..1..0..0....1..1..0..1..0..0....1..0..1..1..1..1

CROSSREFS

Sequence in context: A171331 A097309 A208778 * A207587 A207843 A206985

Adjacent sequences:  A208496 A208497 A208498 * A208500 A208501 A208502

KEYWORD

nonn

AUTHOR

R. H. Hardin Feb 27 2012

STATUS

approved

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Last modified August 14 21:07 EDT 2018. Contains 313756 sequences. (Running on oeis4.)