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A046531 Numerators of elements to right of central elements of 1/2-Pascal triangle (by row). 0

%I

%S 1,1,3,1,5,1,11,7,1,9,9,1,20,27,11,1,67,19,13,1,147,105,51,15,1,126,

%T 78,33,17,1

%N Numerators of elements to right of central elements of 1/2-Pascal triangle (by row).

%H Thomas M. Richardson, <a href="http://arxiv.org/abs/1609.01193">The three 'R's and Dual Riordan Arrays</a>, arXiv:1609.01193 [math.CO], 2016.

%e 1/1;

%e 1/1 1/1; --> 1

%e 1/1 1/2 1/1; --> 1

%e 1/1 3/2 3/2 1/1; --> 3 1

%e 1/1 5/2 3/1 5/2 1/1; --> 5 1

%e 1/1 7/2 11/2 11/2 7/2 1/1; --> 11 7 1

%e 1/1 9/2 9/1 11/1 9/1 9/2 1/1; --> 9 9 1

%e 1/1 11/2 27/2 20/1 20/1 27/2 11/2 1/1; --> 20 27 11 1

%Y Cf. A046213.

%K tabf,nonn,more

%O 1,3

%A _Mohammad K. Azarian_

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Last modified April 23 02:15 EDT 2019. Contains 322380 sequences. (Running on oeis4.)