%I M1994 N0786 #25 Apr 01 2017 00:36:17
%S 2,10,2104,13098898366,1842172695541070949024622,
%T 72975978136470898183217648961745628914523492408810350
%N Number of switching networks with C(2,n) acting on the domain and AG(3,2) acting on the domain.
%D M. A. Harrison, On the number of classes of switching networks, J. Franklin Instit., 276 (1963), 313-327.
%D N. J. A. Sloane, A Handbook of Integer Sequences, Academic Press, 1973 (includes this sequence).
%D N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
%H Vincenzo Librandi, <a href="/A000884/b000884.txt">Table of n, a(n) for n = 1..10</a>
%H <a href="/index/Sw#switching">Index entries for sequences related to switching networks</a>
%F a(n) = (224*2^(2^n) + 42*4^(2^n) + 8^(2^n) + 448*2^(n + 2^(n-1)) + 92*2^(n + 2^n + 2^(n-1)) + 384*2^n + 168*2^(n+2^n) - 448*2^(2^(n-1)) - 92*2^(2^n + 2^(n-1)))/(1344*2^n). - _Sean A. Irvine_, Jan 24 2012
%t Table[(224*2^(2^n)+42*4^(2^n)+8^(2^n)+448*2^(n+2^(n-1))+92*2^(n+2^n+2^(n-1))+384*2^n+168*2^(n+2^n)-448*2^(2^(n-1))-92*2^(2^n+2^(n-1)))/(1344*2^n),{n,1,11}] (* _Vincenzo Librandi_, Mar 28 2012 *)
%K nonn,easy
%O 1,1
%A _N. J. A. Sloane_
%E More terms from _Sean A. Irvine_, Jan 23 2012