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A258938 Index of the Lucas numbers in A258740. 2
2, 3, 4, 6, 7, 8, 9, 11, 14, 18, 19, 21, 23, 25, 30, 32, 33, 42, 44, 47, 57, 59, 63, 65, 71, 76, 77, 82, 83, 85, 86, 93, 97, 107, 108, 111, 116, 117, 118, 121, 127, 131, 135, 137, 139, 143, 151, 153, 154, 162, 164, 167, 175, 177, 183, 185, 188, 189, 194, 195 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

This sequence is probably finite with 228 terms. The probable last term of the sequence is a(228) = 6903, and the corresponding Lucas number A000032(6903) = 4382083468497... 10084254004 contains 1443 decimal digits.

LINKS

Michel Lagneau, Table of n, a(n) for n = 1..228

EXAMPLE

7 is in the sequence because L(7)= A000032(7) = 29 = A258740(5) where 2+9=11 > 7.

MAPLE

with(combinat, fibonacci):with(numtheory):

a:=n->2*fibonacci(n-1)+fibonacci(n):

   for m from 1 to 400 do:

      x:=a(m):y:=convert(x, base, 10):n1:=nops(y):

      s:=sum('y[i]', 'i'=1..n1):

       if s>m

        then

        printf(`%d, `, m):

        else

       fi:

     od:

PROG

(PARI) lista(nn) = {for(n=1, nn, if (sumdigits(l = fibonacci(n+1) + fibonacci(n-1)) > n, print1(n, ", "))); } \\ Altug Alkan, Nov 08 2015

CROSSREFS

Cf. A000032, A258740.

Sequence in context: A087919 A113508 A059325 * A004763 A320456 A239015

Adjacent sequences:  A258935 A258936 A258937 * A258939 A258940 A258941

KEYWORD

nonn,base

AUTHOR

Michel Lagneau, Nov 07 2015

STATUS

approved

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Last modified July 15 14:07 EDT 2019. Contains 325030 sequences. (Running on oeis4.)