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 A038687 Concatenate i >= 1 and j >= 1, then sort. 2
 11, 12, 13, 14, 15, 16, 17, 18, 19, 21, 22, 23, 24, 25, 26, 27, 28, 29, 31, 32, 33, 34, 35, 36, 37, 38, 39, 41, 42, 43, 44, 45, 46, 47, 48, 49, 51, 52, 53, 54, 55, 56, 57, 58, 59, 61, 62, 63, 64, 65, 66, 67, 68, 69, 71, 72, 73, 74, 75, 76, 77, 78, 79, 81, 82, 83, 84, 85, 86, 87, 88, 89, 91, 92, 93, 94, 95, 96, 97, 98, 99, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 112 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Numbers with at least two nonzero decimal digits. - Charles R Greathouse IV, Jan 13 2015 LINKS Table of n, a(n) for n=1..93. FORMULA a(n) = n + O(log n). - Charles R Greathouse IV, Jan 13 2015 MAPLE isA038687 := proc(n) local nzdigs, d ; nzdigs := 0 ; for d in convert(n, base, 10) do if d > 0 then nzdigs := nzdigs+1 ; end if ; end do: simplify(nzdigs>=2 ) ; end proc: for n from 1 to 120 do if isA038687(n) then printf("%d, ", n) ; end if; end do: # R. J. Mathar, May 25 2023 MATHEMATICA Select[Range[11, 99], DigitCount[#, 10, 0]==0&] (* Harvey P. Dale, Nov 14 2013 *) PROG (PARI) is(n)=n/=10^valuation(n, 10); n>9 \\ Charles R Greathouse IV, Jan 13 2015 CROSSREFS Sequence in context: A178405 A162903 A216589 * A359983 A236403 A293728 Adjacent sequences: A038684 A038685 A038686 * A038688 A038689 A038690 KEYWORD nonn,base,easy AUTHOR N. J. A. Sloane. STATUS approved

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Last modified December 7 05:59 EST 2023. Contains 367630 sequences. (Running on oeis4.)