login

Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.

First denominator and then numerator of each element of the 1/4-Pascal triangle (by row), excluding 2's.
0

%I #12 Jun 22 2013 16:05:40

%S 1,1,1,1,1,1,1,1,4,1,1,1,1,1,4,5,4,5,1,1,1,1,4,9,5,4,9,1,1,1,1,4,13,4,

%T 19,4,19,4,13,1,1,1,1,4,17,1,8,19,1,8,4,17,1,1,1,1,4,21,4,49,35,35,4,

%U 49,4,21,1,1,1,1,4,25,35,4,119,1,35,4,119,35,4,25,1,1,1,1,4,29

%N First denominator and then numerator of each element of the 1/4-Pascal triangle (by row), excluding 2's.

%e 1/1; --> 1 1

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

%e 1/1 1/4 1/1; --> 1 1 4 1 1 1

%e 1/1 5/4 5/4 1/1; --> ...

%e 1/1 9/4 5/2 9/4 1/1;

%e 1/1 13/4 19/4 19/4 13/4 1/1;

%e 1/1 17/4 8/1 19/2 8/1 17/4 1/1;

%e 1/1 21/4 49/4 35/2 35/2 49/4 21/4 1/1; ...

%Y Cf. A046563.

%K tabf,nonn,frac,less

%O 1,9

%A _Mohammad K. Azarian_