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A232072 Number of (n+1)X(4+1) 0..1 arrays with every element equal to some horizontal, diagonal or antidiagonal neighbor, with top left element zero 1
161, 3681, 91636, 2265691, 56126173, 1389867384, 34420057373, 852404560481, 21109624812630, 522775448585677, 12946425187404245, 320615523780601420, 7939976687329054275, 196631869363448682249, 4869547301285168517052 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 4 of A232076

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) +236*a(n-3) -2046*a(n-4) -9966*a(n-5) -6228*a(n-6) +65257*a(n-7) +188276*a(n-8) -46843*a(n-9) -649584*a(n-10) -764788*a(n-11) +412637*a(n-12) +1321769*a(n-13) +761732*a(n-14) +182925*a(n-15) -381900*a(n-16) -337601*a(n-17) -102296*a(n-18) +5318*a(n-19) -23355*a(n-20) -10567*a(n-21) -20176*a(n-22) -133*a(n-23) -430*a(n-24) -2201*a(n-25) +428*a(n-26) +116*a(n-27) +62*a(n-28) +8*a(n-29) +4*a(n-30)

EXAMPLE

Some solutions for n=3

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

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

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

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

CROSSREFS

Sequence in context: A200883 A196635 A196640 * A278205 A197089 A278890

Adjacent sequences:  A232069 A232070 A232071 * A232073 A232074 A232075

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 17 2013

STATUS

approved

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Last modified June 30 10:14 EDT 2022. Contains 354921 sequences. (Running on oeis4.)