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A108779 Numbers of the form (10^i)*(11^j), with i, j >= 0. 9
1, 10, 11, 100, 110, 121, 1000, 1100, 1210, 1331, 10000, 11000, 12100, 13310, 14641, 100000, 110000, 121000, 133100, 146410, 161051, 1000000, 1100000, 1210000, 1331000, 1464100, 1610510, 1771561, 10000000, 11000000, 12100000, 13310000 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Reinhard Zumkeller, Table of n, a(n) for n = 1..10000

PROG

(Haskell)

import Data.Set (singleton, deleteFindMin, insert)

a108779 n = a108779_list !! (n-1)

a108779_list = f $ singleton (1, 0, 0) where

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

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

-- Reinhard Zumkeller, May 15 2015

CROSSREFS

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

Sequence in context: A139707 A139709 A221714 * A288336 A288805 A171782

Adjacent sequences:  A108776 A108777 A108778 * A108780 A108781 A108782

KEYWORD

nonn

AUTHOR

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

STATUS

approved

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Last modified April 20 17:54 EDT 2019. Contains 322310 sequences. (Running on oeis4.)