login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A099543 Sums of the prime factors of the Rhonda numbers to base 10 (sequence A099542). The terms in this sequence are equal to (Product of digits of terms of A099542)/10, which is simply the definition of Rhonda numbers to base 10. 1
24, 24, 28, 30, 54, 72, 32, 24, 48, 72, 30, 216, 54, 64, 72, 126, 162, 60, 90, 168, 504, 84, 63, 84, 504, 70, 270, 168, 54, 96, 252, 288, 96, 168, 343, 784, 96, 216, 405, 96, 324, 108, 48, 1260, 160, 144, 192, 1134, 243, 252, 1080, 72, 192, 144, 486, 81, 48 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
a(n) = A001414(A099542(n)). - Reinhard Zumkeller, Dec 01 2012
LINKS
Eric Weisstein's World of Mathematics, Rhonda Number
EXAMPLE
The first term in A099542 is 1568. The sum of its prime factors is 24.
MATHEMATICA
rnQ[n_]:=Times@@IntegerDigits[n]==10Total[Times@@@FactorInteger[n]]; Times@@IntegerDigits[#]/10&/@ Select[Range[350000], rnQ] (* Harvey P. Dale, Mar 13 2011 *)
PROG
(Haskell)
a099543 = a001414 . a099542 -- Reinhard Zumkeller, Dec 01 2012
CROSSREFS
Cf. A099542.
Sequence in context: A217140 A235249 A115028 * A188311 A185497 A186939
KEYWORD
nonn,base
AUTHOR
Mark Hudson (mrmarkhudson(AT)hotmail.com), Oct 21 2004
EXTENSIONS
More terms from Harvey P. Dale, Mar 13 2011.
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.

License Agreements, Terms of Use, Privacy Policy. .

Last modified April 20 12:36 EDT 2024. Contains 371844 sequences. (Running on oeis4.)