This site is supported by donations to The OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A246022 Prime sieve of Champernowne constant A033307. 2

%I

%S 1,4,6,10,12,1,516,18,202122,242,28,30,3,3,6,3,94041,444546,4849,

%T 52535455,58,60,6,646566,686,0,72,74,78,8,848,888990,9495,98,0,102,

%U 104,6,108,1,112,1141,16,201,22,26,1,29130,3,4,6,138,1,411,44,47148,150,531

%N Prime sieve of Champernowne constant A033307.

%C 12345678910111213141516171819202122232425262728293031323334353637383940\

%C 4142434445464748495051525354555657...

%C Find the first occurrence of the prime 2 and replace it with a space:

%C 1 3456789101112131415161718192021222324252627282930...

%C 1 456789101112131415161718192021222324252627282930... Repeat the process with 3

%C 1 4 6789101112131415161718192021222324252627282930... Then 5

%C 1 4 6 89101112131415161718192021222324252627282930... Then 7

%C 1 4 6 8910 12 141516 18 202122 24252627282930... Then 11, 13, 17, etc., until the first occurrence of every prime is eliminated. 89, 41, 52627, will disappear.

%C Then consolidate gaps between the remaining digits into a single comma:

%C 1, 4, 6, 10, 12, 1, 516, 18, 202122, 242, 28, 30, 3, 3, 6, ...

%H Manfred Scheucher, <a href="/A246022/b246022.txt">Table of n, a(n) for n = 1..393</a>

%H Manfred Scheucher, <a href="/A246022/a246022.sage.txt">Sage Script</a>

%Y Suggested by A245770, A248804, A247861. Cf. A033307, A007376.

%K nonn,base

%O 1,2

%A _N. J. A. Sloane_, Aug 14 2014

%E More terms from _Manfred Scheucher_, Jun 05 2015

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified August 25 13:50 EDT 2019. Contains 326324 sequences. (Running on oeis4.)