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

Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 56th year, we are closing in on 350,000 sequences, and we’ve crossed 9,700 citations (which often say “discovered thanks to the OEIS”).

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A186208 The first n-digit prime in the decimal expansion of 1/e. 1
 3, 67, 367, 7879, 36787, 367879, 8794411, 21595523, 867445811, 2159552377, 23215955237, 794411714423, 9441171442321, 57147274345919, 767834507836801, 4581113103176783, 67834507836801697, 595523770161460867, 3176783450783680169 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS 1/e = 0.36787944117144232159.... LINKS Matthew House, Table of n, a(n) for n = 1..996 MAPLE Digits := 10000: p0 := evalf(1/exp(1))*10:for d from 1 to 20 do: id:=0:for   i from 0 to 50000 while(id=0) do :q0:=trunc(p0*10^(i+d-1)): x:= irem(q0, 10^d):   if type(x, prime)=true and length(x)=d then printf(`%d, `, x):id:=1: else fi:od:od: MATHEMATICA With[{x=RealDigits[1/E, 10, 1000][[1]]}, Table[FromDigits[ First[ Select[ Partition[x, n, 1], PrimeQ[FromDigits[#]]&]]], {n, 20}]]  (* Harvey P. Dale, Feb 17 2011 *) CROSSREFS Cf. A001113, A095935. Sequence in context: A201857 A294395 A342505 * A217625 A238316 A182367 Adjacent sequences:  A186205 A186206 A186207 * A186209 A186210 A186211 KEYWORD nonn,base AUTHOR Michel Lagneau, Feb 15 2011 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.

Last modified December 3 21:17 EST 2021. Contains 349468 sequences. (Running on oeis4.)