OFFSET
0,2
COMMENTS
There are 548 Lynch-Bell numbers, listed in A115569; a(n)=0 for n>7.
EXAMPLE
There are no (Lynch-Bell) numbers with zero digits.
The nine one-digit Lynch-Bell numbers are {1, ..., 9}.
The five two-digit Lynch-Bell numbers are {12, 15, 24, 36, 48}.
The seven-digit Lynch-Bell numbers are 105 permutations of (the digits of) 9867312, which is the largest possible Lynch-Bell number. (The digit 5 cannot appear since there is at least one even digit. Replacing any of the given 7 digits by a digit 4 yields numbers not divisible by 9, or not divisible by 3 if the 9 is replaced.)
PROG
CROSSREFS
KEYWORD
base,nonn
AUTHOR
Rick L. Shepherd, Apr 02 2006
EXTENSIONS
Extended to index 0, and some more zeros appended by M. F. Hasler, Jan 31 2016
STATUS
approved