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A202466 Number of (n+2)X5 binary arrays with no more than two of any consecutive three bits set in any row or column 1
9253, 172197, 3157010, 57262144, 1044865367, 19045287529, 347030298362, 6325139804762, 115276893817821, 2100921552416129, 38289856014452302, 697839603278397490, 12718251853368355369, 231792595465614884173 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 3 of A202471

LINKS

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

FORMULA

Empirical: a(n) = 5*a(n-1) +111*a(n-2) +2014*a(n-3) +6557*a(n-4) +16985*a(n-5) -300395*a(n-6) -493842*a(n-7) -3268704*a(n-8) +24359757*a(n-9) -12644117*a(n-10) +245975711*a(n-11) -1125487262*a(n-12) +1522045563*a(n-13) -8087124133*a(n-14) +26777225059*a(n-15) -37534618180*a(n-16) +126433919538*a(n-17) -328489679534*a(n-18) +391815137702*a(n-19) -986011308148*a(n-20) +2122690461724*a(n-21) -1946484646192*a(n-22) +3965682502748*a(n-23) -7576159630469*a(n-24) +5031247471425*a(n-25) -9030564869781*a(n-26) +16603266615558*a(n-27) -7654100893731*a(n-28) +12605001997031*a(n-29) -23568791472338*a(n-30) +7284025623281*a(n-31) -11592415733849*a(n-32) +22376915552667*a(n-33) -4108143304538*a(n-34) +7534067585378*a(n-35) -14586401994989*a(n-36) +851438613707*a(n-37) -3651106111783*a(n-38) +6680505527134*a(n-39) +516890844951*a(n-40) +1330578342773*a(n-41) -2180316021478*a(n-42) -457849189081*a(n-43) -350426435259*a(n-44) +504531345207*a(n-45) +156767801632*a(n-46) +63587131764*a(n-47) -80543670710*a(n-48) -29202619778*a(n-49) -7801427038*a(n-50) +8520515392*a(n-51) +3153222478*a(n-52) +630256472*a(n-53) -563860143*a(n-54) -184231091*a(n-55) -26381427*a(n-56) +24372940*a(n-57) +5813919*a(n-58) +360687*a(n-59) -727057*a(n-60) -95650*a(n-61) +8776*a(n-62) +14851*a(n-63) +693*a(n-64) -335*a(n-65) -184*a(n-66) -a(n-67) +3*a(n-68) +a(n-69)

EXAMPLE

Some solutions for n=1

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

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

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

CROSSREFS

Sequence in context: A031848 A184211 A035910 * A013815 A013900 A100696

Adjacent sequences: A202463 A202464 A202465 * A202467 A202468 A202469

KEYWORD

nonn

AUTHOR

R. H. Hardin Dec 19 2011

STATUS

approved

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Last modified January 26 18:02 EST 2023. Contains 359833 sequences. (Running on oeis4.)