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 A092778 #9 Jan 21 2019 19:01:55
%S A092778 1,11,12,23,35,58,813,1321,2134,3455,5589,89144,144233,233377,377610,
%T A092778 610987,9871597,15972584,25844181,41816765,676510946,1094617711,
%U A092778 1771128657,2865746368,4636875025,75025121393,121393196418
%N A092778 Concatenate pairs of successive Fibonacci numbers.
%F A092778 a(n) = A000045(n)*10^(A055642(A000045(n+1))) + A000045(n+1). - _José de Jesús Camacho Medina_, Dec 16 2016
%t A092778 AA = Table[Fibonacci[n]*10^(Floor[Log[10, 10Fibonacci[n + 1]]]) + Fibonacci[n + 1], {n, 1, 12}] (* _José de Jesús Camacho Medina_, Dec 16 2016 *)
%o A092778 (PARI) glue(a,b)=a*10^logint(10*b,10)+b
%o A092778 a(n)=glue(fibonacci(n),fibonacci(n+1)) \\ _Charles R Greathouse IV_, Dec 16 2016
%Y A092778 Cf. A000045, A022101.
%K A092778 nonn,base
%O A092778 0,2
%A A092778 _Jorge Coveiro_, Apr 14 2004