Search: id:A159905
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%I A159905
%S A159905 1,1,1,2,2,1,2,2,2,1,4,4,3,2,1,2,2,3,3,2,1,6,6,5,4,3,2,1,4,4,4,4,4,3,2,
%T A159905 1,6,6,6,6,5,4,3,2,1,4,4,5,5,5,5,4,3,2,1,10,10,9,8,7,6,5,4,3,2,1,4,4,4,
%U A159905 5,6,6,6,5,4,3,2,1
%N A159905 Triangle read by rows, Mobius transform of A004736
%C A159905 Row sums = A007438, Mobius transform of the triangular numbers.
%C A159905 Left border = phi(n), A000010.
%F A159905 Triangle read by rows, A054525 * A004736. A054525 = the Mobius transform, 
               A004736 = the natural number "decrescendo" triangle: (1; 2,1; 3,2,
               1;...)
%e A159905 First few rows of the triangle =
%e A159905 1;
%e A159905 1, 1;
%e A159905 2, 2, 1;
%e A159905 2, 2, 2, 1;
%e A159905 4, 4, 3, 2, 1;
%e A159905 2, 2, 3, 3, 2, 1;
%e A159905 6, 6, 5, 4, 3, 2, 1;
%e A159905 4, 4, 4, 4, 4, 3, 2, 1;
%e A159905 6, 6, 6, 6, 5, 4, 3, 2, 1;
%e A159905 4, 4, 5, 5, 5, 5, 4, 3, 2, 1;
%e A159905 ...
%Y A159905 Cf. A007438
%Y A159905 Sequence in context: A116543 A107260 A116204 this_sequence A106054 A160242 
               A023568
%Y A159905 Adjacent sequences: A159902 A159903 A159904 this_sequence A159906 A159907 
               A159908
%K A159905 nonn,tabl
%O A159905 1,4
%A A159905 Gary W. Adamson (qntmpkt(AT)yahoo.com), Apr 25 2009

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