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A253332 Number of (7+1)X(n+1) 0..1 arrays with every 2X2 subblock sum nondecreasing horizontally, vertically and antidiagonally ne-to-sw 1

%I #4 Dec 30 2014 11:56:18

%S 3249,9228,25659,74953,210417,600020,1660088,4590122,12462900,

%T 33364770,88332846,228094422,584261303,1450543774,3577232487,

%U 8532736844,20234227845,46437782630,106028484423,234761319957,517489800375

%N Number of (7+1)X(n+1) 0..1 arrays with every 2X2 subblock sum nondecreasing horizontally, vertically and antidiagonally ne-to-sw

%C Row 7 of A253326

%H R. H. Hardin, <a href="/A253332/b253332.txt">Table of n, a(n) for n = 1..210</a>

%H R. H. Hardin, <a href="/A253332/a253332.txt">Empirical recurrence of order 87</a>

%F Empirical recurrence of order 87 (see link above)

%e Some solutions for n=4

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

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

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

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

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

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_, Dec 30 2014

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Last modified March 28 17:42 EDT 2024. Contains 371254 sequences. (Running on oeis4.)