

A117765


Lucas numbers for which the sum of the digits is a Fibonacci number.


0



1, 3, 11, 76, 521, 39603, 271443, 33385282, 370248451, 688846502588399, 71420983074726546239, 22291846172619859445381409012498, 6957708846765958465433550193562787551898761
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OFFSET

1,2


COMMENTS

The next term is too large to include.  Joshua Zucker, May 11 2006


LINKS



EXAMPLE

39603 is in the sequence because (1)it is a Lucas number and (2)the sum of its digits 3+9+6+0+3=21 is a Fibonacci number.


MATHEMATICA

With[{fibs=Fibonacci[Range[50]]}, Select[LucasL[Range[300]], MemberQ[ fibs, Total[ IntegerDigits[#]]]&]] (* Harvey P. Dale, Mar 28 2015 *)


CROSSREFS



KEYWORD

base,nonn


AUTHOR

Luc Stevens (lms022(AT)yahoo.com), Apr 15 2006


EXTENSIONS



STATUS

approved



