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A129808 Decimal expansion of constant equal to concatenated nonprimes. 5
1, 4, 6, 8, 9, 1, 0, 1, 2, 1, 4, 1, 5, 1, 6, 1, 8, 2, 0, 2, 1, 2, 2, 2, 4, 2, 5, 2, 6, 2, 7, 2, 8, 3, 0, 3, 2, 3, 3, 3, 4, 3, 5, 3, 6, 3, 8, 3, 9, 4, 0, 4, 2, 4, 4, 4, 5, 4, 6, 4, 8, 4, 9, 5, 0, 5, 1, 5, 2, 5, 4, 5, 5, 5, 6, 5, 7, 5, 8, 6, 0, 6, 2, 6, 3, 6, 4, 6, 5, 6, 6, 6, 8, 6, 9, 7, 0, 7, 2, 7, 4, 7, 5, 7, 6 (list; constant; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

A theorem of Copeland & Erdős proves that this constant is 10-normal. - Charles R Greathouse IV, Feb 06 2015

LINKS

Table of n, a(n) for n=1..105.

Demi Allen, Sky Brewer, Distribution Of Sequences Generated By Certain Simply-Constructed Normal Numbers, arXiv:1511.01789 [math.NT], 2015.

A. H. Copeland and P. Erdős, Note on normal numbers, Bull. Amer. Math. Soc. 52 (1946), pp. 857-860.

EXAMPLE

1.468910121415161820212224252627283032333435363839404244454648495...

MATHEMATICA

Flatten[IntegerDigits/@With[{nn=80}, Complement[Range[nn], Prime[ Range[ PrimePi[nn]]]]]] (* Harvey P. Dale, Sep 16 2011 *)

PROG

(PARI) print1(1); forcomposite(n=4, 76, d=digits(n); for(i=1, #d, print1(", "d[i]))) \\ Charles R Greathouse IV, Feb 06 2015

CROSSREFS

Cf. A033308 (decimal expansion of Copeland-Erdos constant: concatenate primes).

Sequence in context: A338028 A110750 A275589 * A330384 A077649 A308375

Adjacent sequences:  A129805 A129806 A129807 * A129809 A129810 A129811

KEYWORD

cons,nonn,base

AUTHOR

Alexander Adamchuk, May 19 2007

STATUS

approved

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Last modified August 4 18:15 EDT 2021. Contains 346455 sequences. (Running on oeis4.)