cp's OEIS Frontend

A245849 Number of length n 0..6 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 A245849 #6 Jul 23 2025 11:30:09
%S A245849 1,1,2,2,5,5,15,17,78,102,569,919,6143,11171,86081,175169,1500038,
%T A245849 3364000,31525459,76939147,780320735,2050031495,22262632431,
%U A245849 62282672077,716105605234,2108542401240,25363729963607,77679827847931
%N A245849 Number of length n 0..6 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 A245849 Column 6 of A245851
%H A245849 R. H. Hardin, <a href="/A245849/b245849.txt">Table of n, a(n) for n = 1..64</a>
%e A245849 Some solutions for n=12
%e A245849 ..0....0....0....0....0....0....0....0....0....0....0....0....0....0....0....0
%e A245849 ..1....1....1....1....1....1....0....1....1....1....1....1....1....1....0....1
%e A245849 ..2....0....1....0....0....1....1....2....0....2....1....2....2....1....1....0
%e A245849 ..2....2....1....1....2....0....2....1....0....3....1....1....1....0....1....2
%e A245849 ..3....3....2....1....2....2....3....3....0....2....0....1....0....2....1....0
%e A245849 ..1....2....2....1....2....0....1....2....0....1....0....3....2....0....0....1
%e A245849 ..2....4....0....0....2....1....1....2....2....1....1....2....1....0....2....2
%e A245849 ..1....3....2....2....2....0....1....3....0....2....2....2....2....1....2....2
%e A245849 ..3....2....0....1....2....1....0....1....0....3....1....2....0....2....0....1
%e A245849 ..2....1....2....1....0....1....2....2....1....2....0....1....2....0....1....1
%e A245849 ..1....0....1....0....1....1....1....1....0....1....1....1....1....1....0....0
%e A245849 ..0....0....0....0....0....0....0....0....0....0....0....0....0....0....0....0
%K A245849 nonn
%O A245849 1,3
%A A245849 _R. H. Hardin_, Aug 04 2014