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A089303
a(n) = floor( (10^n - 1) / (9*n) ).
1
1, 5, 37, 277, 2222, 18518, 158730, 1388888, 12345679, 111111111, 1010101010, 9259259259, 85470085470, 793650793650, 7407407407407, 69444444444444, 653594771241830, 6172839506172839, 58479532163742690, 555555555555555555
OFFSET
1,2
COMMENTS
Previous name was "Concatenation of 1 n times divided by n." - Michael Somos, May 31 2014
LINKS
FORMULA
a(n) = floor((10^n-1)/(9n)).
MAPLE
f:= n -> floor((10^n-1)/(9*n)):
map(f, [$1..100]); # Robert Israel, Oct 30 2019
MATHEMATICA
Table[Floor[(10^n-1)/(9n)], {n, 20}] (* Harvey P. Dale, Dec 06 2018 *)
PROG
(Sage) [floor(gaussian_binomial(n, 1, 10)/n) for n in range(1, 21)] # - Zerinvary Lajos, May 29 2009
CROSSREFS
Cf. A002275.
Sequence in context: A083232 A236581 A262410 * A164595 A046636 A091126
KEYWORD
nonn
AUTHOR
Amarnath Murthy, Oct 31 2003
EXTENSIONS
More terms from Sam Alexander, Feb 27 2004
STATUS
approved