login
This site is supported by donations to The OEIS Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A124190 a(n) is largest prime < 4*a(n-1). 1

%I

%S 2,7,23,89,353,1409,5623,22483,89923,359663,1438643,5754571,23018273,

%T 92073083,368292317,1473169213,5892676849,23570707387,94282829533,

%U 377131318127,1508525272477,6034101089897,24136404359569,96545617438253

%N a(n) is largest prime < 4*a(n-1).

%H Artur Jasinski, Dec 16 2006, <a href="/A124190/b124190.txt">Table of n, a(n) for n = 1..40</a>

%Y Cf. A006902, A040016, A120031-A120040.

%K nonn

%O 1,1

%A _Artur Jasinski_, Dec 16 2006

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.

License Agreements, Terms of Use, Privacy Policy. .

Last modified September 20 12:13 EDT 2019. Contains 327231 sequences. (Running on oeis4.)