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A231999 Number of (2+1)X(n+1) 0..1 arrays with no element having a strict majority of its horizontal and antidiagonal neighbors equal to one 1
9, 32, 121, 406, 1225, 3916, 12769, 41180, 131769, 423168, 1361889, 4378942, 14070001, 45221064, 145371249, 467284392, 1501950025, 4827700176, 15517934041, 49879756014, 160328968921, 515348072772, 1656495128401, 5324506601820 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Row 2 of A231997

LINKS

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

FORMULA

Empirical: a(n) = 3*a(n-1) -3*a(n-2) +11*a(n-3) +5*a(n-4) -7*a(n-5) +11*a(n-6) -35*a(n-7) -11*a(n-8) +9*a(n-9) -5*a(n-10) +13*a(n-11) +3*a(n-12) -a(n-13) +a(n-14) -a(n-15)

EXAMPLE

Some solutions for n=7

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

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

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

CROSSREFS

Sequence in context: A051662 A326247 A225918 * A297298 A229444 A300773

Adjacent sequences:  A231996 A231997 A231998 * A232000 A232001 A232002

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 16 2013

STATUS

approved

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Last modified May 23 17:47 EDT 2022. Contains 353993 sequences. (Running on oeis4.)