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A117911 Number of n-digit Lynch-Bell numbers. 2
0, 9, 5, 30, 67, 84, 248, 105, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,2
COMMENTS
There are 548 Lynch-Bell numbers, listed in A115569; a(n)=0 for n>7.
LINKS
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
(PARI) A117911(n)=#A115569_row(n) \\ M. F. Hasler, Jan 31 2016
CROSSREFS
Cf. A115569.
Sequence in context: A238475 A180878 A146282 * A061041 A248308 A035417
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

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Last modified April 13 05:19 EDT 2024. Contains 371639 sequences. (Running on oeis4.)