A129808 Decimal expansion of constant equal to concatenated nonprimes.

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

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