This site is supported by donations to The OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A230093 Number of values of k such that k + (sum of digits of k) is n. 19
 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 1, 1, 2, 1 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,102 COMMENTS a(n) is the number of times n occurs in A062028. LINKS Reinhard Zumkeller, Table of n, a(n) for n = 0..10000 MAPLE # Maple code for A062028, A230093, A003052, A225793, A230094. with(LinearAlgebra): read transforms; # to get digsum M := 1000; A062028 := Array(0..M); A230093 := Array(0..M); for n from 0 to M do    m := n+digsum(n);    A062028[n] := m;    if m <= M then A230093[m] := A230093[m]+1; fi; od: t1:=[seq(A062028[i], i=0..M)]; # A062028 as list (but incorrect offset 1) t2:=[seq(A230093[i], i=0..M)]; # A230093 as list, but then a(0) has index 1 # A003052 := COMPl(t1); # COMPl has issues, may be incorrect for M <> 1000 ctmax:=4; for h from 0 to ctmax do ct[h] := []; od: for i from 1 to M do    h := lis2[i];    if h <= ctmax then ct[h] := [op(ct[h]), i]; fi; od: A225793 := ct[1]; A230094 := ct[2]; # A003052 := ct[0]; # see there for better code MATHEMATICA Module[{nn=110, a, b, c, d}, a=Tally[Table[x+Total[IntegerDigits[x]], {x, 0, nn}]]; b=a[[All, 1]]; c={#, 0}&/@Complement[Range[nn], b]; d=Sort[Join[a, c]]; d[[All, 2]]] (* Harvey P. Dale, Jun 12 2019 *) PROG (Haskell) a230093 n = length \$ filter ((== n) . a062028) [n - 9 * a055642 n .. n]  -- Reinhard Zumkeller, Oct 11 2013 (PARI) apply( A230093(n)=sum(i=n>0, min(9*logint(n+!n, 10)+8, n\2), sumdigits(n-i)==i), [1..150]) \\ M. F. Hasler, Nov 08 2018 CROSSREFS Cf. A006064, A007953 (sum of digits), A062028 (n + sum of its digits), A004207, A228085, A003052, A176995, A225793, A230094, A055642. Cf. A107740 (this applied to primes). Sequence in context: A073520 A152137 A097470 * A033322 A130713 A236619 Adjacent sequences:  A230090 A230091 A230092 * A230094 A230095 A230096 KEYWORD nonn,base AUTHOR N. J. A. Sloane, Oct 10 2013 EXTENSIONS Edited by M. F. Hasler, Nov 08 2018 STATUS approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified October 19 21:17 EDT 2019. Contains 328229 sequences. (Running on oeis4.)