A class of Boolean functions of n variables and rank 3.

Terms

a(0) =0a(1) =0a(2) =0a(3) =13a(4) =75a(5) =263a(6) =720a(7) =1688a(8) =3550a(9) =6882a(10) =12516a(11) =21615a(12) =35761a(13) =57057a(14) =88244a(15) =132834a(16) =195260a(17) =281044a(18) =396984a(19) =551361a(20) =754167a(21) =1017355a(22) =1355112a(23) =1784156a(24) =2324058a(25) =2997590a(26) =3831100a(27) =4854915a(28) =6103773a(29) =7617285