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A205331 Number of (n+1)X5 0..2 arrays with the number of equal 2X2 subblock diagonal pairs and equal antidiagonal pairs differing from each horizontal or vertical neighbor, and new values 0..2 introduced in row major order 1
2160, 39852, 827904, 17757552, 381376368, 8198181984, 176201014416, 3787178593416, 81398278366368, 1749504275073888, 37602271807627584, 808189417886692584, 17370493977296486352, 373345722670556657952 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 4 of A205335

LINKS

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

FORMULA

Empirical: a(n) = 18*a(n-1) +162*a(n-2) -1630*a(n-3) -7292*a(n-4) +40266*a(n-5) +153218*a(n-6) -289954*a(n-7) -912699*a(n-8) +408092*a(n-9) -10757308*a(n-10) -14129504*a(n-11) +156955072*a(n-12) +97653472*a(n-13) -903632160*a(n-14) +1868643200*a(n-15) +1929652736*a(n-16) -19338232320*a(n-17) +24779127808*a(n-18) +69276303360*a(n-19) -225213616128*a(n-20) +28917637120*a(n-21) +670518738944*a(n-22) -903935393792*a(n-23) -187621441536*a(n-24) +744869068800*a(n-25) -53941895168*a(n-26) -180004847616*a(n-27) -335544320*a(n-28) +3154116608*a(n-29) for n>31

EXAMPLE

Some solutions for n=4

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

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

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

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

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

CROSSREFS

Sequence in context: A205629 A299796 A253715 * A154822 A061335 A159238

Adjacent sequences:  A205328 A205329 A205330 * A205332 A205333 A205334

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 26 2012

STATUS

approved

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Last modified May 15 17:50 EDT 2021. Contains 343920 sequences. (Running on oeis4.)