%I

%S 1,1,4,7,12

%N Maximal AND-OR-XOR formula complexity (operator count) for n-input Boolean functions

%D D. E. Knuth, The Art of Computer Programming, Volume 4A, Section 7.1.2.

%Y Cf. A056287.

%K nonn,nice,hard,more

%O 1,3

%A _Russ Cox_, Dec 30 2010