%I A001320 M2982 N1204
%S A001320 1,3,14,240,63488,4227858432,18302628885633695744,
%T A001320 338953138925153547590470800371487866880,
%U A001320 115565932813024562229384322928592814283244066726840484812818018414147674308608
%N A001320 Number of self-complementary Boolean functions of n variables.
%D A001320 N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, 
               Academic Press, 1995 (includes this sequence).
%D A001320 N. J. A. Sloane, A Handbook of Integer Sequences, Academic Press, 1973 
               (includes this sequence).
%D A001320 M. A. Harrison, The number of equivalence classes of Boolean functions 
               under groups containing negation, IEEE Trans. Electron. Comput. 12 
               (1963), 559-561.
%H A001320 <a href="Sindx_Bo.html#Boolean">Index entries for sequences related to 
               Boolean functions</a>
%F A001320 Sum(((fermat(n)-1))/2^(j+1),j=0..n). - Zerinvary Lajos (zerinvarylajos(AT)yahoo.com), 
               Oct 24 2006
%p A001320 a:=n->sum(((fermat(n)-1))/2^(j+1),j=0..n): seq(a(n), n=0..8); - Zerinvary 
               Lajos (zerinvarylajos(AT)yahoo.com), Oct 24 2006
%Y A001320 Cf. A000610.
%Y A001320 Sequence in context: A132490 A058388 A081383 this_sequence A133028 A144985 
               A081397
%Y A001320 Adjacent sequences: A001317 A001318 A001319 this_sequence A001321 A001322 
               A001323
%K A001320 nonn,easy,nice
%O A001320 1,2
%A A001320 N. J. A. Sloane (njas(AT)research.att.com).
%E A001320 More terms from Vladeta Jovovic (vladeta(AT)eunet.rs), Feb 23 2000