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A257360 Number of (n+2)X(7+2) 0..1 arrays with no 3x3 subblock diagonal sum equal to the antidiagonal sum or central row sum less than the central column sum 1

%I

%S 674856,451584,475608,1249924,2980712,6012304,12278736,30603024,

%T 76329692,159516900,325547732,771395076,1870800360,4019813604,

%U 8515864500,19860701184,46654887392,102038080356,221226236476,508023966564

%N Number of (n+2)X(7+2) 0..1 arrays with no 3x3 subblock diagonal sum equal to the antidiagonal sum or central row sum less than the central column sum

%C Column 7 of A257361

%H R. H. Hardin, <a href="/A257360/b257360.txt">Table of n, a(n) for n = 1..210</a>

%F Empirical: a(n) = 2*a(n-3) +16*a(n-4) +8*a(n-5) +4*a(n-6) +2*a(n-7) +18*a(n-8) +6*a(n-9) -4*a(n-10) -18*a(n-11) -141*a(n-12) -60*a(n-13) +48*a(n-14) +18*a(n-15) -117*a(n-16) -66*a(n-17) +48*a(n-19) +279*a(n-20) +108*a(n-21) -12*a(n-22) -12*a(n-23) +15*a(n-24) +36*a(n-25) +16*a(n-26) -6*a(n-27) -36*a(n-28) -8*a(n-29) -4*a(n-30) -2*a(n-31) -a(n-32) -2*a(n-33) +a(n-36) for n>43

%e Some solutions for n=1

%e ..0..0..0..0..0..1..0..1..1....0..0..0..0..1..1..0..0..1

%e ..0..1..1..0..1..1..1..0..0....1..1..1..1..1..1..1..1..0

%e ..1..0..0..1..1..1..0..0..0....0..0..1..1..0..0..0..1..0

%Y Cf. A257361

%K nonn

%O 1,1

%A _R. H. Hardin_, Apr 20 2015

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Last modified October 23 17:37 EDT 2021. Contains 348215 sequences. (Running on oeis4.)