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 A110575 Numbers k that divide A110574(k); or k such that A110574(k) is a Niven number. 1
 1, 3, 7, 9, 13, 23, 171, 399, 819, 8673, 17263 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS a(12) > 138000, if it exists. - Amiram Eldar, Mar 01 2024 LINKS Table of n, a(n) for n=1..11. EXAMPLE a(3) = 7 because 1101001100101/7 = 157285871443. MATHEMATICA seq[max_] := Module[{o = Select[Range[2*max], OddQ[DigitCount[#, 2][[1]]] &], sum = 0, s = {}}, Do[sum += 10^(o[[k]] - 1); If[Divisible[IntegerReverse[sum], k], AppendTo[s, k]], {k, 1, Length[o]}]; s]; seq[1000] (* Amiram Eldar, Mar 01 2024 *) CROSSREFS Cf. A005349, A110574. Sequence in context: A176553 A109370 A018663 * A325556 A174840 A032664 Adjacent sequences: A110572 A110573 A110574 * A110576 A110577 A110578 KEYWORD nonn,base,more AUTHOR Jason Earls, Jul 28 2005 EXTENSIONS a(10)-a(11) from Amiram Eldar, Mar 01 2024 STATUS approved

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Last modified August 14 03:23 EDT 2024. Contains 375146 sequences. (Running on oeis4.)