login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A156083 In this sequence each prime ends a prime century. Place a 0 between the final two digits, and raise the 100s digit by 1, to form the first prime of the next prime century. 1
8783, 22787, 23899, 26893, 37897, 54679, 64891, 65789, 67891, 70891, 71899, 73897, 76781, 89899, 91781, 98899, 108677, 110899, 115891, 124897, 130787, 131899, 133781, 139891, 144671, 149899, 152899, 164789, 187897, 190891, 206783, 207679 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

These appear to occur in a fairly random fashion much like prime quadruplets.

LINKS

Charles R Greathouse IV, Table of n, a(n) for n = 1..10000

EXAMPLE

8783 becomes 8803, note that 83 become 803.

PROG

(PARI) is(p)=my(q=nextprime(p+1), a=p%1000\100); isprime(p) && a==p%100\10-1 && q-p==90-10*a \\ Charles R Greathouse IV, Feb 07 2013

CROSSREFS

Sequence in context: A255758 A255751 A254840 * A249956 A031791 A179128

Adjacent sequences:  A156080 A156081 A156082 * A156084 A156085 A156086

KEYWORD

nonn,base

AUTHOR

Ki Punches, Feb 03 2009, Feb 08 2009

EXTENSIONS

Corrected and extended terms. Ki Punches, Feb 08 2009

a(22) and a(32) corrected by Charles R Greathouse IV, Feb 07 2013

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 July 27 10:44 EDT 2021. Contains 346304 sequences. (Running on oeis4.)