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 A100703 #4 Sep 15 2014 17:31:57
%S A100703 3,5,23,143,3455,497663,1719926783,855945643032575,
%T A100703 1472163837099830446915583,1260092222195718836233500990239234064383,
%U A100703 1855062200927301576619335433612526767115692635401046316868960255
%N A100703 (T(n-1) + T(n-2)) + T(n-1)*T(n-2) where T(0)=3, T(1)=5 and n >= 2.
%F A100703 a(n) = (a(n-1) + a(n-2)) + a(n-1)*a(n-2) with a(0)=3 and a(1)=5
%e A100703 (3 + 5) + 3*5 = 23
%t A100703 RecurrenceTable[{a[0]==3,a[1]==5,a[n]==a[n-1]+a[n-2]+a[n-1]a[n-2]},a,{n,10}] (* _Harvey P. Dale_, Sep 15 2014 *)
%Y A100703 Similar to A063896 but with initial terms 3 and 5.
%K A100703 nonn
%O A100703 0,1
%A A100703 _Parthasarathy Nambi_, Dec 09 2004
%E A100703 More terms from _Harvey P. Dale_, Sep 15 2014