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A117764 Lucas numbers for which the sum of the digits is also a Lucas number. 0
1, 3, 4, 7, 29, 47, 322, 2207, 1149851, 10749957122, 119218851371, 312119004989, 505019158607, 84722519070079276, 8784200221406821330636, 1473646213395791149646646123, 2657608295638762232902023676028758508503879 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..16.

EXAMPLE

1149851 is in the sequence because (1) it is a Lucas number and (2)the sum of its digits 1+1+4+9+8+5+1=29 is also a Lucas number.

MATHEMATICA

Module[{nn=300, luc}, luc=LucasL[Range[nn]]; Select[luc, MemberQ[luc, Total[ IntegerDigits[#]]]&]] (* Harvey P. Dale, Apr 19 2018 *)

CROSSREFS

Cf. A000204.

Sequence in context: A042037 A041091 A270373 * A113874 A007677 A042773

Adjacent sequences:  A117761 A117762 A117763 * A117765 A117766 A117767

KEYWORD

base,nonn

AUTHOR

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

EXTENSIONS

More terms from Joshua Zucker, May 11 2006

STATUS

approved

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Last modified April 19 21:01 EDT 2019. Contains 322291 sequences. (Running on oeis4.)