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

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A105464 Irregular primeth recurrence: a(n+1) = a(n)-th irregular prime. 0
1, 37, 613, 12923, 390581, 15353617, 756551141 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

There are 310443 irregular primes less than 12 million.

LINKS

Table of n, a(n) for n=1..7.

MATHEMATICA

ip={ the list of irregular primes to 12 million }; NestList[ ip[[ # ]] &, 1, 2]

CROSSREFS

Cf. A000928, A007097.

Sequence in context: A133998 A231381 A056217 * A140764 A228225 A156923

Adjacent sequences:  A105461 A105462 A105463 * A105465 A105466 A105467

KEYWORD

hard,nonn,changed

AUTHOR

Robert G. Wilson v, Apr 07 2005

EXTENSIONS

a(6)-a(7) from Amiram Eldar, Mar 05 2019

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
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified March 18 19:58 EDT 2019. Contains 321293 sequences. (Running on oeis4.)