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 A125289 Numbers with unique nonzero digit in decimal representation. 7
 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 20, 22, 30, 33, 40, 44, 50, 55, 60, 66, 70, 77, 80, 88, 90, 99, 100, 101, 110, 111, 200, 202, 220, 222, 300, 303, 330, 333, 400, 404, 440, 444, 500, 505, 550, 555, 600, 606, 660, 666, 700, 707, 770, 777, 800, 808, 880, 888, 900, 909 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS A043537(a(n)) <= 2; complement of A125290; A043537(A004719(a(n))) = 1: A004719(a(n)) is a repdigit number, see A010785; also numbers having exactly one partition into digit values of their decimal representations: A061827(a(n))=1. LINKS Rémy Sigrist, Table of n, a(n) for n = 1..9207 Eric Weisstein's World of Mathematics, Repeating Decimal Eric Weisstein's World of Mathematics, Repdigit PROG (Python) A125289_list = [n for n in range(10**4) if len(set(str(n))-{'0'})==1] # Chai Wah Wu, Jan 04 2015 (PARI) is(n, base=10) = #Set(select(sign, digits(n, base)))==1 \\ Rémy Sigrist, Mar 28 2020 (PARI) a(n, base=10) = { for (w=0, oo, if (n<=(base-1)*2^w, my (d=1+(n-1)\2^w, k=2^w+(n-1)%(2^w)); return (d*fromdigits(binary(k), base)), n -= (base-1)*2^w)) } \\ Rémy Sigrist, Mar 28 2020 CROSSREFS Cf. A125292. Sequence in context: A169824 A325152 A061917 * A180482 A193460 A114801 Adjacent sequences:  A125286 A125287 A125288 * A125290 A125291 A125292 KEYWORD nonn,base AUTHOR Reinhard Zumkeller, Nov 26 2006 STATUS approved

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Last modified May 8 02:26 EDT 2021. Contains 343652 sequences. (Running on oeis4.)