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%I #6 Jan 15 2022 22:22:55
%S 1,1,2,2,5,5,15,17,78,102,569,919,6143,11171,86082,175170,1500088,
%T 3364342,31535985,77009999,782070479,2060080119,22479986118,
%U 63401859508,738236317300,2214267997760,27326431358171,86567146969997
%N 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 Column 7 of A245851.
%H R. H. Hardin, <a href="/A245850/b245850.txt">Table of n, a(n) for n = 1..40</a>
%e Some solutions for n=12
%e ..0....0....0....0....0....0....0....0....0....0....0....0....0....0....0....0
%e ..1....0....0....0....1....0....1....1....1....1....1....1....1....0....1....1
%e ..0....0....1....1....0....1....2....2....1....2....2....1....0....0....2....0
%e ..2....0....2....2....2....2....2....0....2....0....3....2....1....1....2....2
%e ..2....0....3....2....1....1....1....0....3....1....2....3....0....2....1....3
%e ..1....1....1....3....0....3....1....0....0....1....1....4....2....2....3....1
%e ..3....1....1....3....0....3....2....2....2....0....1....4....2....1....3....0
%e ..0....0....1....2....1....1....3....0....0....2....2....3....0....0....1....2
%e ..0....0....0....2....2....2....2....1....2....1....3....2....1....1....2....0
%e ..2....0....2....1....0....1....1....1....2....1....2....1....0....1....2....2
%e ..1....0....1....0....1....0....1....1....1....1....1....1....1....0....1....1
%e ..0....0....0....0....0....0....0....0....0....0....0....0....0....0....0....0
%Y Cf. A245851.
%K nonn
%O 1,3
%A _R. H. Hardin_, Aug 04 2014
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