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A300558 a(n) is the concatenation n written in base 2 n times, n-1 written in base 2 n-1 times, ..., 1 written in base 2 once. 3
1, 10101, 11111110101, 10010010010011111110101, 10110110110110110010010010011111110101, 11011011011011011010110110110110110010010010011111110101, 11111111111111111111111011011011011011010110110110110110010010010011111110101 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Seiichi Manyama, Table of n, a(n) for n = 1..21

PROG

(Ruby)

def A300558(n)

  a = '1'

  [1] + (2..n).map{|i| a = (i.to_s(2) * i + a.to_s).to_i}

end

p A300558(10)

CROSSREFS

Cf. A007088, A300517, A300557.

Sequence in context: A267680 A267876 A144863 * A227407 A227409 A260247

Adjacent sequences:  A300555 A300556 A300557 * A300559 A300560 A300561

KEYWORD

nonn,base

AUTHOR

Seiichi Manyama, Mar 08 2018

STATUS

approved

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Last modified November 18 09:55 EST 2019. Contains 329261 sequences. (Running on oeis4.)