cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A119354 Smallest number which does not use digit n-1 written in base n, but does use digit b-1 written in base b for any 1

Original entry on oeis.org

0, 1, 2, 7, 14, 23, 139, 47, 485, 319, 989, 239, 5927, 23319, 27719, 13679, 57119, 159119, 746927, 500399, 1627919, 2585519, 3694397, 7305479, 17067599, 82265039, 384812999, 41126399, 61483967, 586370399, 589188599, 2196179999, 1770310079
Offset: 2

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Crossrefs

Programs

  • Haskell
    import Data.List (elemIndex); import Data.Maybe (fromJust)
    a119354 = fromJust . (`elemIndex` a119352_list)
    -- Reinhard Zumkeller, Apr 12 2015

Formula

A119352(a(n)) = n and A119352(m) != n for m < a(n). - Reinhard Zumkeller, Apr 12 2015

Extensions

More terms from R. J. Mathar, Sep 07 2007
a(21)-a(27) by Reinhard Zumkeller, Apr 12 2015
a(28)-a(34) from Amiram Eldar, Jul 29 2025