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A103708 a(n+1) = d(n)+9 where d(n) is the n-th decimal digit in the concatenation of the digits in the sequence, starting with a(1)=1. 8
1, 10, 10, 9, 10, 9, 18, 10, 9, 18, 10, 17, 10, 9, 18, 10, 17, 10, 9, 10, 16, 10, 9, 18, 10, 17, 10, 9, 10, 16, 10, 9, 18, 10, 9, 10, 15, 10, 9, 18, 10, 17, 10, 9, 10, 16, 10, 9, 18, 10, 9, 10, 15, 10, 9, 18, 10, 17, 10, 9, 18, 10, 9, 10, 14, 10, 9, 18, 10, 17, 10, 9, 10, 16, 10, 9, 18, 10 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Robert Israel, Table of n, a(n) for n = 1..10000

MAPLE

with(queue):

Q:= new(1): R:= 1:

for iter from 1 to 100 do

  v:= dequeue(Q)+9;

  R:= R, v;

  L:= convert(v, base, 10);

  for i from 1 to nops(L) do enqueue(Q, L[-i]) od;

od:

R; # Robert Israel, Jul 06 2020

MATHEMATICA

Flatten[ NestList[ Function[x, Flatten[ IntegerDigits[x] + 9]], {1}, 8]]

CROSSREFS

Cf. A103700, A103701, A103702, A103703, A103704, A103705, A103706, A103707.

Sequence in context: A263450 A087028 A145279 * A239051 A131722 A072803

Adjacent sequences:  A103705 A103706 A103707 * A103709 A103710 A103711

KEYWORD

base,nonn

AUTHOR

Robert G. Wilson v, Feb 12 2005

EXTENSIONS

Edited and corrected by Robert Israel, Jul 06 2020

STATUS

approved

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Last modified July 7 13:40 EDT 2022. Contains 355148 sequences. (Running on oeis4.)