Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.
%I #11 Jan 26 2022 21:02:20
%S 0,1,1,2,3,2,3,4,4,3,4,6,5,6,4,5,7,7,7,7,5,6,8,8,10,8,8,6,7,10,9,11,
%T 11,9,10,7,8,11,11,12,12,12,11,11,8,9,12,12,15,13,13,15,12,12,9,10,13,
%U 13,16,16,14,16,16,13,13,10,11,15,14,17,17,17,17,17,17,14,15,11,12,16,16
%N Pair addition table cast as diagonal numbers.
%C Cast pairs 0,0 1,0 0,1 2,0 1,1, ... as 0,1,2,3,4,... Sequence shadows pair addition table.
%H Sean A. Irvine, <a href="https://github.com/archmageirvine/joeis/blob/master/src/irvine/oeis/a054/A054237.java">Java program</a> (github)
%e a(1,1)=3 because 1 shadows (1,0) and 3 shadows (2,0) and (1,0)+(1,0)=(2,0).
%K easy,nonn,tabl
%O 0,4
%A _Marc LeBrun_, Feb 07 2000