A113765 - OEIS

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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.

1, 7, 17, 717, 17717, 71717717, 1771771717717, 717177171771771717717, 1771771717717717177171771771717717, 7171771717717717177171771771717717717177171771771717717

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OFFSET

0,2

COMMENTS

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

LINKS

Table of n, a(n) for n=0..9.

EXAMPLE

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

CROSSREFS

Cf. A008352, A113526.

Cf. A000045 - the Fibonacci numbers.

Sequence in context: A089563 A159028 A102266 * A269447 A013540 A153375

Adjacent sequences: A113762 A113763 A113764 * A113766 A113767 A113768

KEYWORD

nonn,base

AUTHOR

Parthasarathy Nambi, Jan 18 2006

EXTENSIONS

More terms from Stefan Steinerberger, Jan 21 2006

STATUS

approved