7-quantum transitions in systems of N >= 7 spin 1/2 particles, in columns by combination indices.

Terms

a(0) =1a(1) =16a(2) =144a(3) =9a(4) =960a(5) =180a(6) =5280a(7) =1980a(8) =55a(9) =25344a(10) =15840a(11) =1320a(12) =109824a(13) =102960a(14) =17160a(15) =286a(16) =439296a(17) =576576a(18) =160160a(19) =8008a(20) =1647360a(21) =2882880a(22) =1201200a(23) =120120a(24) =1365a(25) =5857280a(26) =13178880a(27) =7687680a(28) =1281280a(29) =43680