This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A117911 #9 Jan 31 2016 22:36:38
%S A117911 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,
%T A117911 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
%N A117911 Number of n-digit Lynch-Bell numbers.
%C A117911 There are 548 Lynch-Bell numbers, listed in A115569; a(n)=0 for n>7.
%e A117911 There are no (Lynch-Bell) numbers with zero digits.
%e A117911 The nine one-digit Lynch-Bell numbers are {1, ..., 9}.
%e A117911 The five two-digit Lynch-Bell numbers are {12, 15, 24, 36, 48}.
%e A117911 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.)
%o A117911 (PARI) A117911(n)=#A115569_row(n) \\ _M. F. Hasler_, Jan 31 2016
%Y A117911 Cf. A115569.
%K A117911 base,nonn
%O A117911 0,2
%A A117911 _Rick L. Shepherd_, Apr 02 2006
%E A117911 Extended to index 0, and some more zeros appended by _M. F. Hasler_, Jan 31 2016