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A117765
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Lucas numbers for which the sum of the digits is a Fibonacci number.
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0
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1, 3, 11, 76, 521, 39603, 271443, 33385282, 370248451, 688846502588399, 71420983074726546239, 22291846172619859445381409012498, 6957708846765958465433550193562787551898761
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OFFSET
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1,2
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COMMENTS
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The next term is too large to include. - Joshua Zucker, May 11 2006
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LINKS
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EXAMPLE
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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.
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MATHEMATICA
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With[{fibs=Fibonacci[Range[50]]}, Select[LucasL[Range[300]], MemberQ[ fibs, Total[ IntegerDigits[#]]]&]] (* Harvey P. Dale, Mar 28 2015 *)
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CROSSREFS
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KEYWORD
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base,nonn
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AUTHOR
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Luc Stevens (lms022(AT)yahoo.com), Apr 15 2006
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EXTENSIONS
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STATUS
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approved
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