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A232050 Number of 4Xn 0..1 arrays with no element less than a strict majority of its horizontal and antidiagonal neighbors 1
16, 65, 446, 3082, 22063, 153562, 1060850, 7322233, 50611921, 350063149, 2421230532, 16745004894, 115803439202, 800864168388, 5538580113288, 38303510063492, 264897950563469, 1831970665295301, 12669468933770841 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Row 4 of A232047

LINKS

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

FORMULA

Empirical: a(n) = 16*a(n-1) -115*a(n-2) +565*a(n-3) -2034*a(n-4) +5817*a(n-5) -13565*a(n-6) +26712*a(n-7) -45206*a(n-8) +66931*a(n-9) -89161*a(n-10) +109246*a(n-11) -128417*a(n-12) +138117*a(n-13) -133354*a(n-14) +106727*a(n-15) -71595*a(n-16) +45288*a(n-17) -14520*a(n-18) -13147*a(n-19) +45149*a(n-20) -49440*a(n-21) +35999*a(n-22) -13855*a(n-23) +8496*a(n-24) +5713*a(n-25) +1489*a(n-26) -5200*a(n-27) -450*a(n-28) +1011*a(n-29) +205*a(n-30) -126*a(n-31) -24*a(n-32) +9*a(n-33) for n>36

EXAMPLE

Some solutions for n=5

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

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

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

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

CROSSREFS

Sequence in context: A044154 A044535 A034720 * A119285 A253673 A041494

Adjacent sequences:  A232047 A232048 A232049 * A232051 A232052 A232053

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 17 2013

STATUS

approved

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Last modified May 7 02:20 EDT 2021. Contains 343636 sequences. (Running on oeis4.)