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A232841 Number of (2+1)X(n+1) 0..2 arrays with every element next to itself plus and minus one within the range 0..2 horizontally, diagonally or antidiagonally 1
16, 312, 6664, 67718, 1051216, 17686598, 265341016, 3829830598, 58936793732, 903190534810, 13541666159416, 204173378654170, 3101530941597892, 46929309853930974, 708692945714600096, 10722849759496524134 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Row 2 of A232839

LINKS

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

FORMULA

Empirical: a(n) = 8*a(n-1) +13*a(n-2) +1133*a(n-3) +5465*a(n-4) -11067*a(n-5) -8377*a(n-6) -457511*a(n-7) -535176*a(n-8) -831303*a(n-9) +1546174*a(n-10) +17664008*a(n-11) +47557034*a(n-12) +7172876*a(n-13) +11021048*a(n-14) -103074156*a(n-15) -445453528*a(n-16) -148653360*a(n-17) -187870536*a(n-18) +993637760*a(n-19) +688136704*a(n-20) -1921134496*a(n-21) -775706432*a(n-22) +1313003264*a(n-23) +1084039168*a(n-24) +57272064*a(n-25) -707039232*a(n-26) +119319552*a(n-27) +164847616*a(n-28) -57176064*a(n-29) +47677440*a(n-30) -26951680*a(n-31) -17891328*a(n-32) -1572864*a(n-33)

EXAMPLE

Some solutions for n=4

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

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

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

CROSSREFS

Sequence in context: A252863 A039746 A232834 * A320064 A172211 A254151

Adjacent sequences:  A232838 A232839 A232840 * A232842 A232843 A232844

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 30 2013

STATUS

approved

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Last modified May 20 21:39 EDT 2022. Contains 353876 sequences. (Running on oeis4.)