OFFSET
1,2
COMMENTS
The choice b>2 in the name of this sequence comes from the fact that base 2 has the desired property for all n>1.
LINKS
Michel Marcus, Table of n, a(n) for n = 1..10000
EXAMPLE
a(4) = 5 since 4 = 4_5, and 5 is the only base b > 2 with digit b-1.
a(7) = 3 since 7 = 21_3 so containing the digit 2.
PROG
(PARI) isok(n, b) = vecmax(digits(n, b)) == b-1;
a(n) = if (n==1, return (1)); my(b=3); while(!isok(n, b), b++); b;
CROSSREFS
KEYWORD
nonn,base
AUTHOR
Michel Marcus, Aug 31 2020
STATUS
approved