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 A243819 Composite numbers n such that every divisor greater than one of n contains the digit 0. 3
 10201, 10403, 10609, 10807, 11009, 11021, 31007, 40501, 41303, 41309, 42907, 43709, 50803, 51409, 51809, 60701, 61307, 61903, 64307, 65509, 70801, 71609, 72203, 73027, 75007, 76409, 81709, 91607, 97049, 101909, 102313, 102919, 103121, 103927, 104131, 104333, 104339, 104939, 104957, 105163, 105949 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS Amiram Eldar, Table of n, a(n) for n = 1..10000 (terms 1..2500 from Barbara W. Waddell and Robert G. Wilson v) EXAMPLE The divisors of 10201 are {1, 101, and 10201}. Except for 1 each has a 0 in its decimal expansion. MATHEMATICA fQ[n_, dgt_] := Union[ MemberQ[#, dgt] & /@ IntegerDigits@ Rest@ Divisors@ n][[1]]; Select[ Range[2, 106000], !PrimeQ[#] && fQ[#, 0] &] CROSSREFS Cf. A062649, A062664, A062668, A062670, A062672, A062674, A062676, A062678, A062680. Sequence in context: A243410 A221119 A105582 * A258890 A255872 A291925 Adjacent sequences: A243816 A243817 A243818 * A243820 A243821 A243822 KEYWORD nonn,base,easy AUTHOR Barbara W. Waddell and Robert G. Wilson v, Jun 11 2014 STATUS approved

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Last modified November 29 06:17 EST 2023. Contains 367422 sequences. (Running on oeis4.)