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A245850 Number of length n 0..7 arrays with new values introduced in order from both ends, and least squares fitting to a straight line with slope zero, with a single point taken as having zero slope.

%I A245850 #6 Jan 15 2022 22:22:55
%S A245850 1,1,2,2,5,5,15,17,78,102,569,919,6143,11171,86082,175170,1500088,
%T A245850 3364342,31535985,77009999,782070479,2060080119,22479986118,
%U A245850 63401859508,738236317300,2214267997760,27326431358171,86567146969997
%N A245850 Number of length n 0..7 arrays with new values introduced in order from both ends, and least squares fitting to a straight line with slope zero, with a single point taken as having zero slope.
%C A245850 Column 7 of A245851.
%H A245850 R. H. Hardin, <a href="/A245850/b245850.txt">Table of n, a(n) for n = 1..40</a>
%e A245850 Some solutions for n=12
%e A245850 ..0....0....0....0....0....0....0....0....0....0....0....0....0....0....0....0
%e A245850 ..1....0....0....0....1....0....1....1....1....1....1....1....1....0....1....1
%e A245850 ..0....0....1....1....0....1....2....2....1....2....2....1....0....0....2....0
%e A245850 ..2....0....2....2....2....2....2....0....2....0....3....2....1....1....2....2
%e A245850 ..2....0....3....2....1....1....1....0....3....1....2....3....0....2....1....3
%e A245850 ..1....1....1....3....0....3....1....0....0....1....1....4....2....2....3....1
%e A245850 ..3....1....1....3....0....3....2....2....2....0....1....4....2....1....3....0
%e A245850 ..0....0....1....2....1....1....3....0....0....2....2....3....0....0....1....2
%e A245850 ..0....0....0....2....2....2....2....1....2....1....3....2....1....1....2....0
%e A245850 ..2....0....2....1....0....1....1....1....2....1....2....1....0....1....2....2
%e A245850 ..1....0....1....0....1....0....1....1....1....1....1....1....1....0....1....1
%e A245850 ..0....0....0....0....0....0....0....0....0....0....0....0....0....0....0....0
%Y A245850 Cf. A245851.
%K A245850 nonn
%O A245850 1,3
%A A245850 _R. H. Hardin_, Aug 04 2014