login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A219996 Centuries whose prime pattern is the same as prime pattern in the previous century. 3
473268, 726761, 1773440, 1808829, 1919129, 2131584, 2165421, 2339972, 2390653, 2518489, 2802592, 2844915, 2982585, 2996185, 3183264, 3193176, 3250987, 3418186, 3428242, 3633473, 3909325, 3953450, 4280456, 4303820, 4373400, 4658286, 4728654, 4978361, 5165403, 5254366 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
x belongs to this sequence if and only if the primality character of (100 * (x-1)) + k is the same as (100 * x) + k for all k = 0..99.
LINKS
FORMULA
a(n) ~ n. In particular there are x - 200x/log x + O(x/log^2 x) members of this sequence below x. - Charles R Greathouse IV, Dec 09 2012
a(n) = A190639(n) + 1.
CROSSREFS
Cf. A181098.
Cf. A190639 (lower century).
Sequence in context: A251370 A190639 A228271 * A183659 A213994 A201226
KEYWORD
nonn,base
AUTHOR
V. Raman, Dec 08 2012
STATUS
approved

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

License Agreements, Terms of Use, Privacy Policy. .

Last modified February 25 16:57 EST 2024. Contains 370332 sequences. (Running on oeis4.)