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Revision History for A046352 (Underlined text is an addition; strikethrough text is a deletion.)

Showing entries 1-10 | older changes
A046352 Composite numbers whose sum of prime factors is palindromic (counted with multiplicity).
(history; published version)
#18 by Michael De Vlieger at Tue Jan 10 16:24:35 EST 2023
STATUS

reviewed

approved

#17 by Sean A. Irvine at Tue Jan 10 14:29:28 EST 2023
STATUS

proposed

reviewed

#16 by Hans Rudolf Widmer at Wed Dec 21 01:06:54 EST 2022
STATUS

editing

proposed

#15 by Hans Rudolf Widmer at Wed Dec 21 01:06:28 EST 2022
MATHEMATICA

Select[Range@1000, CompositeQ@#&&PalindromeQ[Dot@@Transpose[FactorInteger@#]]&] (* Hans Rudolf Widmer, Dec 21 2022 *)

STATUS

approved

editing

#14 by Jon E. Schoenfield at Thu Oct 10 22:53:39 EDT 2019
STATUS

editing

approved

#13 by Jon E. Schoenfield at Thu Oct 10 22:53:36 EDT 2019
AUTHOR

Patrick De Geest, Jun 15 1998.

STATUS

approved

editing

#12 by Bruno Berselli at Wed Sep 09 09:03:22 EDT 2015
STATUS

proposed

approved

#11 by R. J. Mathar at Wed Sep 09 08:46:31 EDT 2015
STATUS

editing

proposed

#10 by R. J. Mathar at Wed Sep 09 08:46:16 EDT 2015
NAME

NumbersComposite numbers whose sum of prime factors is palindromic (counted with multiplicity).

LINKS

R. J. Mathar, <a href="/A046352/b046352.txt">Table of n, a(n) for n = 1..2014</a>

MAPLE

n := 1 ;

for i from 2 to 30000 do

if not isprime(i) then

sof := A001414(i) ;

if isA002113(sof) then

printf("%d %d\n", n, i) ;

n := n+1 ;

end if;

end if;

end do: # R. J. Mathar, Sep 09 2015

STATUS

approved

editing

#9 by Bruno Berselli at Wed Jun 05 03:33:37 EDT 2013
STATUS

proposed

approved

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Last modified August 30 04:38 EDT 2024. Contains 375526 sequences. (Running on oeis4.)