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 A061383 Arithmetic mean of digits is an integer. 28
 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 11, 13, 15, 17, 19, 20, 22, 24, 26, 28, 31, 33, 35, 37, 39, 40, 42, 44, 46, 48, 51, 53, 55, 57, 59, 60, 62, 64, 66, 68, 71, 73, 75, 77, 79, 80, 82, 84, 86, 88, 91, 93, 95, 97, 99, 102, 105, 108, 111, 114, 117, 120, 123, 126, 129 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,3 COMMENTS A004426(a(n)) = A004427(a(n)). [From Reinhard Zumkeller, May 27 2010] A175688 is a subsequence; complement of A180157; A180160(a(n))=0. [From Reinhard Zumkeller, Aug 15 2010] It seems 'obvious' that n log n << a(n) < n log n; is this true? - Charles R Greathouse IV, Feb 06 2013 LINKS R. Zumkeller, Table of n, a(n) for n = 0..10000 EXAMPLE 123 is a term as the arithmetic mean is (1+2+3)/3 = 2. MATHEMATICA Select[Range[0, 129], IntegerQ[Total[x=IntegerDigits[#]]/Length[x]] &] (* Jayanta Basu, May 17 2013 *) PROG (MAGMA) [0] cat [n: n in [1..130] | IsZero(&+Intseq(n) mod #Intseq(n))];  // Bruno Berselli, Jun 30 2011 (MAGMA) [0] cat [n: n in [1..130] | IsIntegral(&+Intseq(n)/#Intseq(n))];   // Bruno Berselli, Feb 09 2016 (PARI) is(n)=my(v=digits(n)); sum(i=1, #v, v[i])%#v==0 \\ Charles R Greathouse IV, Feb 06 2013 (Haskell) a061383 n = a061383_list !! (n-1) a061383_list = filter (\x -> mod (a007953 x) (a055642 x) == 0) [0..] -- Reinhard Zumkeller, Jun 18 2013 CROSSREFS Cf. A007953, A055642. Sequence in context: A191839 A032959 A275945 * A059708 A247945 A225580 Adjacent sequences:  A061380 A061381 A061382 * A061384 A061385 A061386 KEYWORD nonn,easy,base AUTHOR Amarnath Murthy, May 03 2001 STATUS approved

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