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 A261794 a(n) is the smallest nonzero number that is not a substring of n in decimal representation. 4
 1, 2, 1, 1, 1, 1, 1, 1, 1, 1, 2, 2, 3, 2, 2, 2, 2, 2, 2, 2, 1, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 1, 1, 1, 1 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,2 COMMENTS A261795(n) = a(A261793(n)). LINKS Reinhard Zumkeller, Table of n, a(n) for n = 0..10000 PROG (Haskell) import Data.List (isInfixOf) a261794 x = f \$ tail a031298_tabf where    f (cs:css) = if isInfixOf cs (a031298_row x)                    then f css else foldr (\d v -> 10 * v + d) 0 cs CROSSREFS Cf. A007089, A031298, A261795, A261793, A261461, A261787. Sequence in context: A031286 A031276 A305080 * A328929 A098744 A337584 Adjacent sequences:  A261791 A261792 A261793 * A261795 A261796 A261797 KEYWORD nonn,base AUTHOR Reinhard Zumkeller, Sep 01 2015 EXTENSIONS Name corrected by Álvar Ibeas, Sep 08 2020 STATUS approved

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Last modified January 24 16:44 EST 2021. Contains 340411 sequences. (Running on oeis4.)