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A113765 Define the first two terms to be 1 and 7. All the other terms are obtained by concatenating the two previous terms. 0

%I #3 Mar 30 2012 18:49:39

%S 1,7,17,717,17717,71717717,1771771717717,717177171771771717717,

%T 1771771717717717177171771771717717,

%U 7171771717717717177171771771717717717177171771771717717

%N Define the first two terms to be 1 and 7. All the other terms are obtained by concatenating the two previous terms.

%C a(n) has Fibonacci(n) digits and the sum of all digits is given by Fibonacci(n-2)+7*Fibonacci(n-1) for all n>4. - _Stefan Steinerberger_, Jan 21 2006

%e The third term is 17 and it is obtained by concatenating the two previous terms 1 and 7.

%Y Cf. A008352, A113526.

%Y Cf. A000045 - the Fibonacci numbers.

%K nonn,base

%O 0,2

%A _Parthasarathy Nambi_, Jan 18 2006

%E More terms from _Stefan Steinerberger_, Jan 21 2006

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Last modified April 25 08:27 EDT 2024. Contains 371964 sequences. (Running on oeis4.)