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A046217 First numerator and then denominator of 1/2-Pascal triangle (by row) excluding 1's and 2's. 0

%I

%S 3,3,5,3,5,7,11,11,7,9,9,11,9,9,11,27,20,20,27,11,13,19,67,40,67,19,

%T 13,15,51,105,147,147,105,51,15,17,33,78,126,147,126,78,33,17,19,83,

%U 111,204,273,273,204,111,83,19,21,51,305,315,477,546,477,315,305,51,21,23

%N First numerator and then denominator of 1/2-Pascal triangle (by row) excluding 1's and 2's.

%e 1/1; 1/1 1/1; 1/1 1/2 1/1; 1/1 3/2 3/2 1/1; 1/1 5/2 3/1 5/2 1/1; 1/1 7/2 11/2 11/2 7/2 1/1; 1/1 9/2 9/1 11/1 9/1 9/2 1/1; 1/1 11/2 27/2 20/1 20/1 27/2 11/2 1/1; ...

%Y Cf. A046213.

%K tabf,nonn,easy

%O 1,1

%A _Mohammad K. Azarian_

%E More terms from _James A. Sellers_, Dec 13 1999

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Last modified September 17 18:22 EDT 2021. Contains 347489 sequences. (Running on oeis4.)