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!)
A101784 Primes which remain prime after omitting maximal digit. 0
23, 29, 37, 43, 53, 59, 73, 79, 83, 97, 113, 131, 137, 139, 151, 163, 173, 179, 181, 191, 193, 197, 199, 211, 233, 239, 263, 283, 293, 311, 313, 317, 331, 379, 397, 419, 431, 439, 443, 461, 463, 479, 487, 491, 503, 523, 541, 563, 593, 599, 613, 617, 619, 631 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

If there are several maximal digits, first from left is omitted.

LINKS

Table of n, a(n) for n=1..54.

MATHEMATICA

omit[d_, list_] := Module[{aux = {}, len = Length[list]}, Do[If[list[[i]] == d, none, aux = Join[aux, {list[[i]]}]], {i, len}]; aux]; maxomit[n_] := omit[Max[IntegerDigits[Prime[n]]], IntegerDigits[Prime[n]]]; convert[lis_] := Sum[Reverse[lis][[i]] 10^(i - 1), {i, 1, Length[lis]}]; Table[If[PrimeQ[convert[maxomit[n]]], Prime[n], 0], {n, 1, 300}] //Union //Rest [From Jose Grau, Feb 17 2010]

CROSSREFS

Sequence in context: A082943 A061754 A180066 * A101802 A156983 A230456

Adjacent sequences:  A101781 A101782 A101783 * A101785 A101786 A101787

KEYWORD

base,easy,nonn

AUTHOR

Zak Seidov, Jan 27 2005

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 31 12:07 EDT 2014. Contains 248864 sequences.