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A046348 Composite palindromes divisible by the sum of their prime factors (counted with multiplicity). 3
4, 646, 2772, 5445, 8778, 30303, 48384, 50505, 54145, 63336, 77077, 117711, 219912, 234432, 239932, 255552, 272272, 294492, 535535, 585585, 636636, 717717, 825528, 888888, 951159, 999999, 1103011, 1112111, 1345431, 2248422, 2267622 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

R. J. Mathar and Giovanni Resta, Table of n, a(n) for n = 1..1000 (first 85 terms from R. J. Mathar)

EXAMPLE

a(2)=646 ->= 2 * 17 * 19 -> 2 + 17 + 19 = 38 so 646 / 38 = 17.

MATHEMATICA

t={}; Do[If[!PrimeQ[n]&&Reverse[x=IntegerDigits[n]]==x&&IntegerQ[n/Total[Times@@@FactorInteger[n]]], AppendTo[t, n]], {n, 4, 2.5*10^6}]; t (* Jayanta Basu, Jun 04 2013 *)

CROSSREFS

Cf. A046346, A046347.

Sequence in context: A169619 A091288 A067171 * A183150 A202368 A114765

Adjacent sequences:  A046345 A046346 A046347 * A046349 A046350 A046351

KEYWORD

nonn,base

AUTHOR

Patrick De Geest, Jun 15 1998.

STATUS

approved

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Last modified March 30 20:18 EDT 2017. Contains 284302 sequences.