|
%I #2 Mar 30 2012 17:31:12
%S 1,3,1,1,1,0,1,2,1,1,0,0,2,1,2,3,1,3,1,2,2,1,1,1,2,0,0,2,1,0,2,2,2,1,
%T 0,2,0,0,3,3,2,2,0,1,1,0,1,0,1,1,1,1,1,1,1,2,3,2,1,1,2,2,3,1,1,3,2,0,
%U 2,2,1,0,1,2,2,2,3,2,2,2,3,3,3,3,3,0,0,1,3,3,2,2,2,3,3,3,2,3,0,1,1,2,1,1,2
%N Write the natural numbers in base 4 in a triangle with k digits in the k-th row, as shown below. Sequence gives the leading diagonal.
%C 1
%C 23
%C 101
%C 1121
%C 32021
%C 222330...
%t t = Flatten[IntegerDigits[Range[1500], 4]]; t[[Table[n(n + 1)/2, {n, 105}]]]
%Y Cf. A104606, A104607, A104609, A104610, A104611, A104612, A104613, A091425, A104614, A104615, A104616, A104617, A104618, A104619, A104620.
%K base,nonn
%O 1,2
%A _Robert G. Wilson v_, Mar 16 2005
|
