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.

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

Offset

1,1

Links

Reinhard Zumkeller, Table of n, a(n) for n = 1..1000

Eric Weisstein's World of Mathematics, Rhonda Number

Formula

a(n) = A001414(A099542(n)). - Reinhard Zumkeller, Dec 01 2012

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. A001414, A099542.

Sequence in context: A235249 A393426 A115028 * A188311 A185497 A186939

Adjacent sequences: A099540 A099541 A099542 * A099544 A099545 A099546

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