OFFSET
1,1
COMMENTS
Starting from n=5, a(n)=A277059(10)=11115, and the corresponding pandigital numbers are 123499...98765 (n-4 nines). Actually, for all n, the resulting numbers are zeroless pandigitals.
a(1)-a(5) constitute row 10 of A277058.
a(n)*A002275(n) is 123456789, 123475869, 123564978, 234186579, 123498765, ...
EXAMPLE
a(2) = 11225079 because A002275(2)*11225079 = 11*11225079 = 123475869 that contains all digits from 1 to 9 and 11225079 is the least number with this property.
PROG
(PARI) isok(n) = my(d=digits(n)); vecmin(d) && (#Set(digits(n)) == 9);
a(n) = {if (n==1, return(123456789)); my(k=1); while(! isok(k*(10^n - 1)/9), k++); k; } \\ Michel Marcus, Sep 26 2019
CROSSREFS
KEYWORD
nonn,base,easy
AUTHOR
Andrey Zabolotskiy and Altug Alkan, Sep 26 2016
STATUS
approved