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A105717 Smallest Fibonacci number that has 7 in the n-th position of the decimal representation 11
377, 377, 6765, 17711, 75025, 5702887, 267914296, 2971215073, 701408733, 7778742049, 27777890035288, 27777890035288, 17167680177565, 72723460248141, 51680708854858323072, 37889062373143906, 679891637638612258 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,1
COMMENTS
a(n) = A000045(A105707(n)).
LINKS
Eric Weisstein's World of Mathematics, Fibonacci Number
EXAMPLE
n=3: A105700(3)=22, a(3)=A000045(22)=17711->1[7]711;
n=4: A105700(4)=25, a(4)=A000045(25)=75025->[7]5025.
MAPLE
N:= 100: # for a(0)..a(N)
F[0]:= 0: F[1]:= 1:
W:= Array(0..N):
count:= 0:
for m from 2 while count < N do
F[m]:= F[m-1]+F[m-2];
L:= convert(F[m], base, 10);
M:= select(t -> L[t+1]=7 and W[t]=0, [$0..min(N, nops(L)-1)]);
count:= count + nops(M);
W[M]:= F[m]
od:
convert(W, list); # Robert Israel, Jun 01 2020
CROSSREFS
Sequence in context: A288916 A198640 A171489 * A352264 A222350 A277942
KEYWORD
nonn,base
AUTHOR
Reinhard Zumkeller, Apr 18 2005
EXTENSIONS
Definition corrected by Robert Israel, Jun 01 2020
STATUS
approved

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Last modified April 17 01:23 EDT 2024. Contains 371756 sequences. (Running on oeis4.)