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

 

Logo

Please make a donation to keep the OEIS running. We are now in our 55th year. In the past year we added 12000 new sequences and reached 8000 citations (which often say "discovered thanks to the OEIS"). We need to raise money to hire someone to manage submissions, which would reduce the load on our editors and speed up editing.
Other ways to donate

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A067248 Numbers n such that digits of prime(n) end in n. 5
7, 9551, 303027, 440999, 968819, 5517973, 27737957, 93230839, 46492090901, 426836115943, 732382677641, 4895576080181 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

There is no further term up to 115000000. - Farideh Firoozbakht, Jan 01 2007

a(13) > pi(10^15). [From Donovan Johnson, May 08 2010]

LINKS

Table of n, a(n) for n=1..12.

EXAMPLE

Prime(968819) = 14968819 which ends in 968819, so 968819 is a term of the sequence.

MATHEMATICA

(*returns true if a ends with b, false o.w.*) f[a_, b_] := Module[{c, d, e, g, h, i, r}, r = False; c = ToString[a]; d = ToString[b]; e = StringLength[c]; g = StringPosition[c, d]; h = Length[g]; If[h > 0, i = g[[h]]; If[i[[2]] == e, r = True]]; r]; Do[If[f[Prime[n], n], Print[n]], {n, 1, 10^6}]

CROSSREFS

Corresponding primes are in A046883.

Cf. A046883, A068575, A075902.

Sequence in context: A116631 A212937 A074489 * A152007 A242773 A131676

Adjacent sequences:  A067245 A067246 A067247 * A067249 A067250 A067251

KEYWORD

base,nonn

AUTHOR

Joseph L. Pe, Feb 20 2002

EXTENSIONS

One more term from Zak Seidov, Sep 27 2002

Two more terms from Farideh Firoozbakht, Jan 01 2007

a(9)-a(12) from Donovan Johnson, May 08 2010

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 December 9 13:50 EST 2019. Contains 329877 sequences. (Running on oeis4.)