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A184608 Half the number of (n+1)X4 binary arrays with no 2X2 subblock sum differing from a horizontal or vertical neighbor subblock sum by more than one 1
98, 918, 8643, 84828, 828804, 8066003, 78509868, 764691186, 7447473213, 72527899252, 706321672438, 6878676029969, 66989453568236, 652390449771730, 6353437751734851, 61874263855863690, 602575259987890954 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 3 of A184614

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..200

FORMULA

Empirical: a(n)=12*a(n-1)-23*a(n-2)+23*a(n-3)+82*a(n-4)-2537*a(n-5)+4657*a(n-6)-4250*a(n-7)+16009*a(n-8)+101590*a(n-9)-136166*a(n-10)-81902*a(n-11)-420943*a(n-12)-875209*a(n-13)+1415588*a(n-14)+1199803*a(n-15)+2852495*a(n-16)+3957349*a(n-17)-5245813*a(n-18)-5554696*a(n-19)-8521658*a(n-20)-9879661*a(n-21)+6322345*a(n-22)+9204139*a(n-23)+11477760*a(n-24)+11993071*a(n-25)+24231*a(n-26)-3374433*a(n-27)-4083820*a(n-28)-4077016*a(n-29)-1020192*a(n-30)+217456*a(n-31)+263296*a(n-32)+140800*a(n-33)+51200*a(n-34)

EXAMPLE

Some solutions for 3X4

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

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

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

...

...2..1..2.......2..1..2.......4..3..3.......2..3..2.......2..1..2...

...3..2..3.......3..2..2.......4..4..4.......3..3..3.......2..2..2...

CROSSREFS

Sequence in context: A233921 A203083 A202370 * A088736 A292552 A233373

Adjacent sequences:  A184605 A184606 A184607 * A184609 A184610 A184611

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 18 2011

STATUS

approved

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Last modified February 24 22:57 EST 2020. Contains 332216 sequences. (Running on oeis4.)