OFFSET
1,2
COMMENTS
Equivalently, integers m with all divisors starting with the same first digit of m; in fact, as 1 divides all the integers, this digit is necessarily 1; also, for these terms m: A357299(m) = A000005(m). - Bernard Schott, Sep 25 2022
EXAMPLE
All divisors of 187 (1, 11, 17, 187) start with digit 1.
MATHEMATICA
fQ[n_] := Module[{d = Divisors[n]}, Union[IntegerDigits[#][[1]] & /@ d] == {1}]; Select[Range[1111], fQ] (* T. D. Noe, Feb 13 2012 *)
CROSSREFS
KEYWORD
nonn,base
AUTHOR
Jaroslav Krizek, Feb 12 2012
STATUS
approved