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A053338 a(n) contains n digits (either '6' or '9') and is divisible by 2^n. 1
6, 96, 696, 9696, 69696, 669696, 6669696, 96669696, 696669696, 9696669696, 69696669696, 969696669696, 9969696669696, 69969696669696, 969969696669696, 9969969696669696, 99969969696669696, 999969969696669696 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..18.

FORMULA

a(n)=a(n-1)+10^(n-1)*(6+3*[a(n-1)/2^(n-1) mod 2]) i.e. a(n) ends with a(n-1); if (n-1)-th term is divisible by 2^n then n-th term begins with a 6, if not then n-th term begins with a 9.

CROSSREFS

Cf. A023410, A050621, A050622, A035014.

Sequence in context: A179058 A303212 A226549 * A115400 A279868 A055358

Adjacent sequences:  A053335 A053336 A053337 * A053339 A053340 A053341

KEYWORD

base,nonn

AUTHOR

Henry Bottomley, Mar 06 2000

STATUS

approved

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Last modified October 13 20:38 EDT 2019. Contains 327981 sequences. (Running on oeis4.)