The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A046352 (Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
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A046352

Composite numbers whose sum of prime factors is palindromic (counted with multiplicity).
(history; published version)

#8 by Jayanta Basu at Wed Jun 05 00:44:30 EDT 2013

STATUS

editing

proposed

#7 by Jayanta Basu at Wed Jun 05 00:44:25 EDT 2013

MATHEMATICA

palQ[n_]:=Reverse[x=IntegerDigits[n]]==x; Select[Range[4, 590], !PrimeQ[#]&&palQ[Total[Times@@@FactorInteger[#]]]&] (* Jayanta Basu, Jun 05 2013 *)

STATUS

approved

editing

#6 by Charles R Greathouse IV at Fri Aug 24 10:47:59 EDT 2012

AUTHOR

_Patrick De Geest (pdg(AT)worldofnumbers.com), _, Jun 15 1998.

Discussion

Fri Aug 24

10:47

OEIS Server: https://oeis.org/edit/global/1824

#5 by Charles R Greathouse IV at Tue Mar 22 02:04:31 EDT 2011

STATUS

proposed

approved

#4 by Charles R Greathouse IV at Tue Mar 22 02:03:55 EDT 2011

KEYWORD

nonn,base

STATUS

approved

proposed

#3 by N. J. A. Sloane at Fri Sep 29 03:00:00 EDT 2006

OFFSET

0,1,1

KEYWORD

nonn,new

nonn

#2 by N. J. A. Sloane at Fri May 16 03:00:00 EDT 2003

KEYWORD

nonn,new

nonn

AUTHOR

Patrick De Geest (Patrick.DeGeest@pingpdg(AT)worldofnumbers.becom), June Jun 15 1998.

#1 by N. J. A. Sloane at Sat Dec 11 03:00:00 EST 1999

NAME

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

DATA

4, 6, 8, 9, 10, 12, 14, 15, 16, 18, 20, 24, 27, 28, 40, 45, 48, 54, 57, 62, 85, 102, 106, 116, 121, 123, 182, 194, 218, 259, 260, 278, 292, 298, 305, 308, 312, 351, 358, 366, 370, 388, 403, 413, 415, 428, 440, 444, 483, 495, 498, 508, 528, 548, 568, 575, 590

OFFSET

0,1

EXAMPLE

116 = 2 * 2 * 29 -> 2 + 2 + 29 = 33 and 33 is a palindrome.

CROSSREFS

Cf. A046353, A046354.

KEYWORD

nonn

AUTHOR

Patrick De Geest (Patrick.DeGeest@ping.be), June 1998.

STATUS

approved