%I #9 Mar 02 2015 16:08:44
%S 2,4,6,15,5005,23197529289205687077586038842122627336104000
%N Recurring combinations: a(n) = C(a(n-1),a(n-2)).
%C The next term has 200700 digits. - _Harvey P. Dale_, Aug 14 2011
%t Transpose[NestList[{Last[#],Binomial[Last[#],First[#]]}&, {2,4}, 6]] [[1]] (* _Harvey P. Dale_, Aug 14 2011 *)
%K nonn,nice,easy
%O 0,1
%A _Floor van Lamoen_