The OEIS mourns the passing of Jim Simons and is grateful to the Simons Foundation for its support of research in many branches of science, including the OEIS.
The OEIS is supported by the many generous donors to the OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A046366 Composite numbers divisible by the palindromic sum of their palindromic prime factors (counted with multiplicity). 2
 4, 16, 27, 308, 440, 528, 594, 5445, 5808, 6534, 8085, 9702, 11550, 13860, 14784, 16500, 16632, 18711, 19800, 21120, 22275, 23760, 25344, 26730, 28512, 32076, 37268, 53240, 63888, 94864, 135520, 152460, 162624, 181500, 182952, 193600 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS The subsequence of numbers k of A046355 such that A262049(k) divides k. - R. J. Mathar, Sep 09 2015 LINKS Giovanni Resta, Table of n, a(n) for n = 1..1387 (terms < 10^10) EXAMPLE 1041714 = 2 * 3^3 * 101 * 191 -> Sum of factors is 303 -> 1041714 / 303 = 3438 exactly. MAPLE isA046366 := proc(n) local sofpp ; if isA046355(n) then sofpp := A262049(n) ; if modp(n, sofpp) = 0 then true; else false; end if; else false; end if; end proc: for n from 2 to 1000 do if isA046366(n) then printf("%d, ", n) ; end if; end do: # R. J. Mathar, Sep 09 2015 MATHEMATICA palQ[n_]:=Reverse[x=IntegerDigits[n]]==x; Select[Range[4, 10^5], !PrimeQ[#]&&And@@palQ/@Join[{y=Total[Times@@@(x=FactorInteger[#])]}, First/@x]&&IntegerQ[#/y]&](* Jayanta Basu, Jun 05 2013 *) CROSSREFS Cf. A046367. Sequence in context: A257309 A271936 A046358 * A227609 A219338 A275211 Adjacent sequences: A046363 A046364 A046365 * A046367 A046368 A046369 KEYWORD nonn,base AUTHOR Patrick De Geest, Jun 15 1998 STATUS approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified May 23 07:28 EDT 2024. Contains 372760 sequences. (Running on oeis4.)