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A177098 6*(10^n-7) 0
18, 558, 5958, 59958, 599958, 5999958, 59999958, 599999958, 5999999958, 59999999958, 599999999958, 5999999999958, 59999999999958, 599999999999958, 5999999999999958, 59999999999999958, 599999999999999958 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
LINKS
FORMULA
G.f. 18*x*(1+20*x) / ( (10*x-1)*(x-1) ). - R. J. Mathar, Aug 24 2011
a(n) = 18*A033175(n-1). - R. J. Mathar, Aug 24 2011
MATHEMATICA
6(10^Range[20]-7) (* Harvey P. Dale, Mar 22 2011 *)
CROSSREFS
Sequence in context: A334179 A183498 A254381 * A133401 A211708 A341305
KEYWORD
nonn,easy
AUTHOR
STATUS
approved

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Last modified April 13 11:46 EDT 2024. Contains 371640 sequences. (Running on oeis4.)