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 A118693 Semiprimes which are divisible by the sum of their digits. 2
 4, 6, 9, 10, 21, 111, 133, 201, 209, 247, 407, 481, 511, 629, 803, 1011, 1101, 1141, 1387, 1417, 1651, 1679, 1853, 2119, 2159, 2353, 2771, 3031, 3077, 3097, 3383, 3439, 3523, 3749, 3781, 4577, 4607, 5149, 5161, 5219, 5833, 6331, 6443, 7033, 7361, 7501 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS EXAMPLE 133 is in the sequence because (1) it is a semiprime, (2) the sum of its digits is 1+3+3=7 and (3) 133 is divisible by 7. MATHEMATICA spQ[n_] := Plus @@ Last /@ FactorInteger@n == 2; Select[Range@7542, spQ@# && IntegerQ[ #/Plus @@ IntegerDigits@# ] &] - Robert G. Wilson v, Jun 10 2006 CROSSREFS Cf. A001358, A118694. Sequence in context: A118695 A235108 A215478 * A084668 A085842 A131220 Adjacent sequences:  A118690 A118691 A118692 * A118694 A118695 A118696 KEYWORD base,nonn AUTHOR Luc Stevens (lms022(AT)yahoo.com), May 20 2006 EXTENSIONS More terms from Robert G. Wilson v, Jun 10 2006 STATUS approved

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Last modified October 16 20:35 EDT 2019. Contains 328103 sequences. (Running on oeis4.)