login
Composite numbers (include 0) whose product of digits is 0.
0

%I #9 Jul 27 2022 13:06:24

%S 0,10,20,30,40,50,60,70,80,90,100,102,104,105,106,108,110,120,130,140,

%T 150,160,170,180,190,200,201,202,203,204,205,206,207,208,209,210,220,

%U 230,240,250,260,270,280,290,300,301,302,303,304,305,306,308,309,310,320

%N Composite numbers (include 0) whose product of digits is 0.

%C Complement of A056709 with respect to A011540. Subsequence of A199978 (nonprime numbers (including 0) whose multiplicative digital root is 0).

%e Number 102 is in sequence because 1*0*2=0.

%t Join[{0},Select[Range[400],CompositeQ[#]&&DigitCount[#,10,0]>0&]] (* _Harvey P. Dale_, Jul 27 2022 *)

%Y Cf. A056709 (primes whose product of digits is 0), A034052 (numbers whose product of digits is 0).

%K nonn,base

%O 1,2

%A _Jaroslav Krizek_, Nov 25 2011