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A098834 Palindromic Smith numbers. 2
4, 22, 121, 202, 454, 535, 636, 666, 1111, 1881, 3663, 7227, 7447, 9229, 10201, 17271, 22522, 24142, 28182, 33633, 38283, 45054, 45454, 46664, 47074, 50305, 51115, 51315, 54645, 55055, 55955, 72627, 81418, 82628, 83038, 83938, 90409, 95359, 96169, 164461 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Donovan Johnson, Table of n, a(n) for n = 1..10000

EXAMPLE

a(3) = 121 because 121 is a Smith number as well as a palindromic number.

MATHEMATICA

d[n_] := IntegerDigits[n]; tr[n_] := Transpose[FactorInteger[n]]; Select[Range[2, 1.7*10^5], !PrimeQ[#] && Reverse[x=d[#]] == x && Total[x] == Total[d@tr[#][[1]]*tr[#][[2]], 2]&] (* Jayanta Basu, Jun 04 2013 *)

CROSSREFS

Cf. A006753.

Sequence in context: A244900 A261193 A025569 * A065983 A236576 A185858

Adjacent sequences:  A098831 A098832 A098833 * A098835 A098836 A098837

KEYWORD

base,nonn

AUTHOR

Shyam Sunder Gupta, Oct 10 2004

STATUS

approved

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Last modified April 27 10:45 EDT 2017. Contains 285512 sequences.