The number of distinct (up to unitary similarity) *-subalgebras of the n X n complex matrices.

Terms

a(0) =1a(1) =2a(2) =5a(3) =10a(4) =21a(5) =38a(6) =72a(7) =124a(8) =218a(9) =363a(10) =607a(11) =977a(12) =1580a(13) =2479a(14) =3889a(15) =5976a(16) =9162a(17) =13812a(18) =20771a(19) =30811a(20) =45561a(21) =66638a(22) =97117a(23) =140237a(24) =201811a(25) =288119a(26) =409904a(27) =579240a(28) =815715a(29) =1141916