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Pair addition table cast as diagonal numbers.
2

%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