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A036920 Numbers n such that digit sum of n equals digit sum of sum of its prime factors (counted with multiplicity). 4
4, 22, 27, 94, 105, 114, 121, 150, 166, 202, 204, 222, 224, 265, 274, 315, 342, 346, 355, 382, 438, 445, 450, 454, 517, 526, 540, 562, 612, 634, 640, 706, 841, 852, 913, 915, 922, 1068, 1086, 1111, 1120, 1122, 1138, 1165, 1185, 1200, 1219, 1221, 1230 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..49.

MATHEMATICA

ds[n_]:=Total[IntegerDigits[n]]; t={}; Do[If[!PrimeQ[n]&&ds[n]==ds[Total[Times@@@FactorInteger[n]]], AppendTo[t, n]], {n, 4, 1230}]; t (* Jayanta Basu, Jun 04 2013 *)

CROSSREFS

Cf. A006753, A036921, A019506.

Sequence in context: A006753 A098836 A204341 * A036921 A083510 A277586

Adjacent sequences:  A036917 A036918 A036919 * A036921 A036922 A036923

KEYWORD

nonn,base

AUTHOR

Patrick De Geest, Jan 04 1999.

STATUS

approved

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Last modified April 28 00:46 EDT 2017. Contains 285556 sequences.