A280657 - OEIS

%I #16 Apr 12 2017 16:01:04

%S 0,1,2,3,4,5,6,7,8,9,10,19,20,29,30,39,40,49,50,59,60,69,70,79,80,89,

%T 90,99,100,109,118,127,136,145,154,163,172,181,190,199,200,209,218,

%U 227,236,245,254,263,272,281,290,299,300,309,318,327,336,345,354,363,372,381,390,399,400,409,418,427,436

%N Numbers beginning with their digital root in decimal representation.

%C 10% of the nonnegative integers are in the sequence, approximatively.

%H Jean-Marc Falcoz, <a href="/A280657/b280657.txt">Table of n, a(n) for n = 1..10001</a>

%e The digital root of 10 is 1 and "1" is the first digit of "10", so 10 is in the sequence.

%e The digital root of 11 is 2 and "2" is not the first digit of "11", so 11 is not in the sequence.

%e The digital root of 19 is 1 and "1" is the first digit of "19", so 19 is in the sequence.

%K nonn,base

%O 1,3

%A _Eric Angelini_ and _Jean-Marc Falcoz_, Apr 12 2017