A275589 The almost-natural numbers with prime digits removed.

1, 4, 6, 8, 9, 1, 0, 1, 1, 1, 1, 1, 4, 1, 1, 6, 1, 1, 8, 1, 9, 0, 1, 4, 6, 8, 9, 0, 1, 4, 6, 8, 9, 4, 0, 4, 1, 4, 4, 4, 4, 4, 4, 6, 4, 4, 8, 4, 9, 0, 1, 4, 6, 8, 9, 6, 0, 6, 1, 6, 6, 6, 4, 6, 6, 6, 6, 6, 8, 6, 9, 0, 1, 4, 6, 8, 9, 8, 0, 8, 1, 8, 8, 8, 4, 8

Offset

1,2

Comments

Nonprime complement of A275542.

Links

Robert Price, Table of n, a(n) for n = 1..4492

Example

Write the digits of the positive integers in continuous form: 1,2,3,4,5,6,7,8,9,1,0,1,1,1,2,1,3,1,4,1,5,...; then remove prime digits (2,3,5,7) from the sequence.

Mathematica

DeleteCases[Map[IntegerDigits, Range@ 120] // Flatten, k_ /; PrimeQ@ k] (* Michael De Vlieger, Aug 03 2016 *)
Table[DeleteCases[IntegerDigits[n], _?PrimeQ], {n, 100}]//Flatten (* Harvey P. Dale, Dec 31 2017 *)

Crossrefs

Nonprimes of A007376 and/or A033307.

Cf. A275542.

Sequence in context: A165957 A338028 A110750 * A129808 A330384 A077649

Adjacent sequences: A275586 A275587 A275588 * A275590 A275591 A275592

Keyword

base,nonn

Author

Dave Durgin, Aug 02 2016

Extensions

More terms from Robert Price, Mar 31 2017

Status

approved