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Distinct even numbers in writing first numerator and then denominator of each element to the right of the central elements of the 1/3-Pascal triangle (by row).
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%I #19 Apr 14 2021 03:50:44

%S 4,10,38,16,18,22,350,220,252,190,40,28,442,148,946,440,34,254,2860,

%T 5434,250,14014,3640,290,46,74074,55432,11284,16604,6380,616,155584,

%U 129506,89284,50456,22984,8228,428,52,95030,72930,46580,24480,10404,160,596258

%N Distinct even numbers in writing first numerator and then denominator of each element to the right of the central elements of the 1/3-Pascal triangle (by row).

%e 1/1; -->

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

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

%e 1/1 4/3 4/3 1/1; --> 4

%e 1/1 7/3 8/3 7/3 1/1; -->

%e 1/1 10/3 5/1 5/1 10/3 1/1; --> 10

%e 1/1 13/3 25/3 10/1 25/3 13/3 1/1;

%e 1/1 16/3 38/3 55/3 55/3 38/3 16/3 1/1; ...

%Y Cf. A046534.

%K tabf,nonn,less

%O 1,1

%A _Mohammad K. Azarian_

%E Corrected and extended by _Sean A. Irvine_, Apr 13 2021