This site is supported by donations to The OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A036978 Numbers for which the "describe what you see" transform A045918 produces a prime. 2
 1, 3, 7, 9, 17, 23, 27, 33, 39, 51, 63, 69, 81, 93, 99, 111, 113, 121, 127, 133, 137, 161, 193, 199, 203, 209, 223, 233, 271, 299, 301, 311, 313, 323, 331, 343, 359, 361, 367, 371, 373, 377, 431, 433, 439, 441, 447, 451, 463, 469, 477, 479, 481, 497 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 LINKS EXAMPLE E.g. 33 -> "Two threes" -> 23, which is prime. PROG (PARI) for(i=1, 999, isprime(A045918(n)) & print1(n", "))  \\ M. F. Hasler, Jan 27 2012 CROSSREFS Cf. A036979. Sequence in context: A117583 A126106 A064194 * A079464 A036976 A230116 Adjacent sequences:  A036975 A036976 A036977 * A036979 A036980 A036981 KEYWORD nonn,base,easy AUTHOR EXTENSIONS Corrected by inserting the missing a(19)=127 by M. F. Hasler, Jan 27 2012 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 | More pages
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified January 22 22:38 EST 2018. Contains 298093 sequences.