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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 A297729

Adjacent sequences:  A085800 A085801 A085802 * A085804 A085805 A085806

KEYWORD

base,nonn

AUTHOR

Jason Earls, Jul 24 2003

STATUS

approved

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Last modified March 21 07:23 EDT 2019. Contains 321367 sequences. (Running on oeis4.)