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!)
 A085803 Semiprimes whose sum of the squares of the digits is also a semiprime. 1
 15, 34, 35, 51, 57, 74, 91, 95, 121, 122, 123, 129, 134, 142, 143, 155, 161, 169, 183, 209, 213, 214, 218, 219, 221, 235, 237, 247, 253, 265, 274, 291, 299, 301, 305, 314, 319, 321, 323, 326, 327, 329, 334, 341, 361, 362, 381, 382, 391, 394, 395, 403, 407 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,1 LINKS Harvey P. Dale, Table of n, a(n) for n = 0..1000 MATHEMATICA Select[Range[500], PrimeOmega[#]==PrimeOmega[Total[IntegerDigits[#]^2]] == 2&] (* Harvey P. Dale, Oct 03 2012 *) CROSSREFS Cf. A001358. Sequence in context: A242243 A219855 A270072 * A168573 A139578 A345733 Adjacent sequences:  A085800 A085801 A085802 * A085804 A085805 A085806 KEYWORD base,nonn AUTHOR Jason Earls, Jul 24 2003 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 August 4 21:32 EDT 2021. Contains 346455 sequences. (Running on oeis4.)