Search: id:A104607
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%I A104607
%S A104607 1,1,1,0,1,1,1,1,2,1,2,0,1,1,0,1,1,2,0,0,1,2,0,1,1,0,0,0,1,1,1,1,2,1,1,
%T A104607 2,0,0,2,2,1,2,1,2,2,2,0,1,1,1,1,0,1,1,0,0,1,1,0,1,2,1,2,2,1,1,2,2,1,2,
%U A104607 0,1,2,2,2,0,2,2,1,0,2,2,2,0,1,2,2,2,2,1,1,0,1,1,2,0,1,1,0,2,0,0,0,1,1
%N A104607 Write the natural numbers in base 3 in a triangle with k digits in the 
               k-th row, as shown below. Sequence gives the leading diagonal.
%C A104607 1
%C A104607 21
%C A104607 011
%C A104607 1220
%C A104607 21221
%C A104607 001011...
%t A104607 t = Flatten[IntegerDigits[Range[1000], 3]]; t[[Table[n(n + 1)/2, {n, 
               105}]]]
%Y A104607 Cf. A104606, A104608, A104609, A104610, A104611, A104612, A104613, A091425, 
               A104614, A104615, A104616, A104617, A104618, A104619, A104620.
%Y A104607 Sequence in context: A077402 A137853 A094114 this_sequence A120728 A092149 
               A127173
%Y A104607 Adjacent sequences: A104604 A104605 A104606 this_sequence A104608 A104609 
               A104610
%K A104607 base,nonn
%O A104607 1,9
%A A104607 Robert G. Wilson v (rgwv(AT)rgwv.com), Mar 16 2005

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