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A103708
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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.
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8
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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)
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OFFSET
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1,2
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LINKS
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Robert Israel, Table of n, a(n) for n = 1..10000
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MAPLE
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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
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MATHEMATICA
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Flatten[ NestList[ Function[x, Flatten[ IntegerDigits[x] + 9]], {1}, 8]]
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CROSSREFS
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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
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KEYWORD
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base,nonn
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AUTHOR
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Robert G. Wilson v, Feb 12 2005
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EXTENSIONS
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Edited and corrected by Robert Israel, Jul 06 2020
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STATUS
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approved
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