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A211979 Numbers n formed by p 1's followed by p - 1 0's, where p is prime(n). 0
110, 11100, 111110000, 1111111000000, 111111111110000000000, 1111111111111000000000000, 111111111111111110000000000000000, 1111111111111111111000000000000000000, 111111111111111111111110000000000000000000000 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..9.

EXAMPLE

For n = 3, the third prime is 5, so a(3) = 111110000 (five 1's followed by four 0's).

MATHEMATICA

(* Technically this is in base 10 *) Table[10^(Prime[n] - 1)((10^Prime[n] - 1)/9), {n, 20}] (* Alonso del Arte, Dec 12 2012 *)

FromDigits[Join[PadRight[{}, #, 1], PadRight[{}, #-1, 0]]]&/@ Prime[ Range[ 10]] (* Harvey P. Dale, Aug 30 2015 *)

CROSSREFS

Binary representation of A060286.

a(n) has A076274(n) digits.

Cf. A007088, A076274, A109241, A135650.

Sequence in context: A109241 A090490 A267688 * A135650 A193240 A267775

Adjacent sequences:  A211976 A211977 A211978 * A211980 A211981 A211982

KEYWORD

nonn,base

AUTHOR

Omar E. Pol, Dec 12 2012

STATUS

approved

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Last modified September 19 13:31 EDT 2021. Contains 347563 sequences. (Running on oeis4.)