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

 

Logo

110 people attended OEIS-50 (videos, suggestions); annual fundraising drive to start soon (donate); editors, please edit! (stack is over 300), your editing is more valuable than any donation.

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A158080 Primes such that largest digit even of n = largest digit even of n-th prime. 0
43, 239, 263, 491, 641, 727, 769, 787, 857, 967, 1013, 1021, 1087, 1223, 1229, 1231, 1237, 1249, 1259, 1279, 1283, 1291, 1297, 1327, 1423, 1543, 1549, 1619, 1657, 1663, 1667, 1669, 1693, 1697, 1699, 1789, 1811, 1823, 1831, 1847, 1861, 1867, 1871, 1873 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Primes p = prime(n) such that a largest even digit individually exists in the base-10 representation for n and p, and such that it also is the same for both. [From R. J. Mathar, May 19 2010]

LINKS

Table of n, a(n) for n=1..44.

MATHEMATICA

Transpose[Select[With[{no=300}, Thread[{Range[no], Prime[Range[no]]}]], Max[Select[IntegerDigits[First[#]], EvenQ]]==Max[Select[IntegerDigits[Last[#]], EvenQ]]>0&]][[2]]  (* Harvey P. Dale, Feb 14 2011 *)

CROSSREFS

Cf. A000027, A000040, A156851.

Sequence in context: A038479 A142334 A107697 * A142450 A202008 A142632

Adjacent sequences:  A158077 A158078 A158079 * A158081 A158082 A158083

KEYWORD

nonn,base,less

AUTHOR

Juri-Stepan Gerasimov, Mar 12 2009

EXTENSIONS

Corrected (61, 163, 181 removed, 239, 263 inserted, 281, 283, 421 removed etc.) by R. J. Mathar, May 19 2010

STATUS

approved

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

Content is available under The OEIS End-User License Agreement .

Last modified October 26 02:56 EDT 2014. Contains 248566 sequences.