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A258889 Number of (n+2)X(3+2) 0..1 arrays with no 3x3 subblock diagonal sum less than the antidiagonal sum or central row sum less than the central column sum 1
3036, 4489, 6072, 8100, 12804, 20164, 33252, 54756, 88312, 141376, 227568, 364816, 583204, 929296, 1483776, 2365444, 3775584, 6022116, 9624864, 15382084, 24627120, 39438400, 63264812, 101525776, 163156600, 262310416, 422211920, 679853476 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 3 of A258894

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) -16*a(n-3) +5*a(n-4) +23*a(n-5) -24*a(n-6) +15*a(n-7) +9*a(n-8) -58*a(n-9) +41*a(n-10) +17*a(n-11) -32*a(n-12) +45*a(n-13) -27*a(n-14) -24*a(n-15) +27*a(n-16) -15*a(n-17) +8*a(n-18) +9*a(n-19) -9*a(n-20) +2*a(n-21) -a(n-22) -a(n-23) +a(n-24) for n>27

EXAMPLE

Some solutions for n=4

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

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

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

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

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

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

CROSSREFS

Cf. A258894

Sequence in context: A334371 A118652 A084719 * A254169 A254162 A254451

Adjacent sequences:  A258886 A258887 A258888 * A258890 A258891 A258892

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jun 14 2015

STATUS

approved

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Last modified September 21 19:40 EDT 2021. Contains 347598 sequences. (Running on oeis4.)