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%I #3 May 01 2014 02:47:42
%S 0,1,0,2,0,0,4,3,0,0,6,5,1,0,0,8,7,2,1,0,0,10,9,3,1,1,0,0,12,11,5,4,1,
%T 1,0,0,14,13,7,6,2,1,1,0,0,16,15,9,8,3,2,1,1,0,0,18,17,11,10,4,2,2,1,
%U 1,0,0,20,19,13,12,6,5,2,2,1,1,0,0,22,21,15,14,8,7,3,2,2,1,1,0,0,24,23
%N X-projection of the tabular N X N -> N bijection A072734.
%o (Scheme) (define (A072740 n) (A025581 (A072735 n)))
%Y The Y-projection is A072741. Composition of A025581 and A072735. A072783(n) = A072740(n)-A072736(n).
%K nonn,tabl
%O 0,4
%A _Antti Karttunen_, Jun 12 2002
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