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

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A071931 Non-Stormer numbers such that their largest prime factor is a Stormer number. 2
8, 30, 32, 38, 46, 50, 55, 57, 75, 76, 99, 100, 111, 122, 128, 132, 133, 142, 174, 177, 183, 185, 200, 203, 212, 213, 228, 237, 242, 253, 254, 265, 266, 268, 274, 278, 302, 305, 319, 322, 327, 334, 342, 348, 360, 377, 380, 381, 394, 395, 411, 413, 418, 437 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Reinhard Zumkeller, Table of n, a(n) for n = 1..10000

PROG

(Haskell)

a071931 n = a071931_list !! (n-1)

a071931_list = filter f a002312_list where

   f x = 2 * gpf <= a006530 (gpf ^ 2 + 1) where gpf = a006530 x

-- Reinhard Zumkeller, Jun 12 2015

CROSSREFS

Cf. A005528, A002312.

Cf. A006530.

Sequence in context: A189946 A239855 A239029 * A074670 A092277 A008469

Adjacent sequences:  A071928 A071929 A071930 * A071932 A071933 A071934

KEYWORD

nonn

AUTHOR

Jason Earls, Jun 14 2002

STATUS

approved

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

License Agreements, Terms of Use, Privacy Policy. .

Last modified October 16 13:12 EDT 2018. Contains 316263 sequences. (Running on oeis4.)