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A085816 Semiprimes such that the sum of the factorials of the digits is also semiprime. 0
14, 15, 22, 25, 51, 82, 115, 118, 121, 123, 141, 145, 146, 158, 166, 177, 185, 201, 203, 205, 206, 213, 215, 218, 254, 259, 265, 295, 302, 321, 323, 407, 411, 415, 417, 451, 471, 481, 482, 501, 502, 511, 514, 517, 526, 529, 542, 562, 581, 614, 671, 706, 707 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..53.

MATHEMATICA

Select[Select[Range[1000], PrimeOmega[#]==2&], PrimeOmega[Total[ IntegerDigits[ #]!]] == 2&] (* Harvey P. Dale, Jul 13 2011 *)

CROSSREFS

Sequence in context: A075658 A047821 A195238 * A090066 A084429 A207036

Adjacent sequences: A085813 A085814 A085815 * A085817 A085818 A085819

KEYWORD

base,easy,nonn

AUTHOR

Jason Earls, Jul 25 2003

STATUS

approved

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Last modified February 9 06:46 EST 2023. Contains 360153 sequences. (Running on oeis4.)