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A138722 Concatenation of p digits 1, p digits 0 and p digits 1, where p is the n-th prime. 5
110011, 111000111, 111110000011111, 111111100000001111111, 111111111110000000000011111111111, 111111111111100000000000001111111111111 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..6.

MATHEMATICA

Table[FromDigits[Join[PadRight[{}, n, 1], PadRight[{}, n, 0], PadRight[{}, n, 1]]], {n, Prime[Range[7]]}] (* Harvey P. Dale, Feb 05 2017 *)

CROSSREFS

Cf. A000040, A138149, A138721.

Sequence in context: A111888 A183770 A023349 * A122240 A250591 A187114

Adjacent sequences:  A138719 A138720 A138721 * A138723 A138724 A138725

KEYWORD

base,easy,nonn

AUTHOR

Omar E. Pol, Mar 29 2008

STATUS

approved

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Last modified August 20 05:23 EDT 2017. Contains 290824 sequences.