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 A046354 Composite palindromes whose sum of prime factors is palindromic (counted with multiplicity). 3
 4, 6, 8, 9, 121, 292, 444, 575, 717, 828, 989, 1331, 2002, 4884, 5445, 8668, 9559, 10201, 11211, 11811, 13231, 14241, 14541, 14641, 15251, 15751, 16261, 16761, 18281, 19291, 19591, 20002, 21112, 21312, 22022, 22922, 23832, 26062, 26162 (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..10000 (first 681 terms from R. J. Mathar) FORMULA A046352 INTERSECT A002113. - R. J. Mathar, Sep 09 2015 EXAMPLE 15751 = 19 * 829 -> 19 + 829 = 848 and 848 is a palindrome. MAPLE n := 1 ; for i from 3 to 30000 do     pal := A002113(i) ;     if not isprime(pal) then         sof := A001414(pal) ;         if isA002113(sof) then             printf("%d %d\n", n, pal) ;             n := n+1 ;         end if;     end if; end do: # R. J. Mathar, Sep 09 2015 MATHEMATICA palQ[n_]:=Reverse[x=IntegerDigits[n]]==x; Select[Range[4, 26170], !PrimeQ[#]&&And@@palQ/@{#, Total[Times@@@FactorInteger[#]]}&](* Jayanta Basu, Jun 05 2013 *) CROSSREFS Cf. A046352, A046353. Sequence in context: A232541 A076612 A182775 * A046357 A227947 A144123 Adjacent sequences:  A046351 A046352 A046353 * A046355 A046356 A046357 KEYWORD nonn,base AUTHOR Patrick De Geest, Jun 15 1998 STATUS approved

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Last modified August 3 17:14 EDT 2020. Contains 336200 sequences. (Running on oeis4.)