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 A108779 Numbers of the form (10^i)*(11^j), with i, j >= 0. 9

%I

%S 1,10,11,100,110,121,1000,1100,1210,1331,10000,11000,12100,13310,

%T 14641,100000,110000,121000,133100,146410,161051,1000000,1100000,

%U 1210000,1331000,1464100,1610510,1771561,10000000,11000000,12100000,13310000

%N Numbers of the form (10^i)*(11^j), with i, j >= 0.

%H Reinhard Zumkeller, <a href="/A108779/b108779.txt">Table of n, a(n) for n = 1..10000</a>

%o import Data.Set (singleton, deleteFindMin, insert)

%o a108779 n = a108779_list !! (n-1)

%o a108779_list = f \$ singleton (1,0,0) where

%o f s = y : f (insert (10 * y, i + 1, j) \$ insert (11 * y, i, j + 1) s')

%o where ((y, i, j), s') = deleteFindMin s

%o -- _Reinhard Zumkeller_, May 15 2015

%Y Cf. A025612, A025616, A025621, A025625, A025629, A025632, A025634, A025635, A108761, A003596, A003597, A107988, A003598, A108698, A003599, A107788, A108687, A108090.

%K nonn

%O 1,2

%A Douglas Winston (douglas.winston(AT)srupc.com), Jun 26 2005

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Last modified May 19 20:41 EDT 2019. Contains 323410 sequences. (Running on oeis4.)