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

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A103753 Numbers k such that the string 235711k is prime. 0
 9, 27, 39, 43, 73, 79, 109, 117, 129, 187, 213, 219, 241, 243, 247, 253, 297, 319, 327, 331, 361, 367, 369, 387, 417, 433, 447, 457, 471, 493, 513, 523, 537, 547, 577, 591, 601, 621, 633, 639, 643, 661, 699, 703, 709, 717, 727, 757, 759 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS EXAMPLE k=9 is in the sequence because 235711k = 2357119 is a prime number. k=79 is in the sequence because 235711k = 23571179 is a prime number. k=187 is in the sequence because 235711k = 235711187 is a prime number. PROG (MAGMA) [ n: n in [1..1750] | IsPrime(Seqint(Intseq(n) cat [1, 1, 7, 5, 3, 2])) ]; // Vincenzo Librandi, Feb 02 2011 CROSSREFS Cf. A103630, A103629, A103590, A103540, A099192. Sequence in context: A036303 A325299 A116455 * A238333 A103965 A069069 Adjacent sequences:  A103750 A103751 A103752 * A103754 A103755 A103756 KEYWORD base,nonn AUTHOR Parthasarathy Nambi, Mar 28 2005 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 January 22 03:32 EST 2021. Contains 340360 sequences. (Running on oeis4.)