Poincaré series (or Poincare series) of Lie algebra associated with a certain braid group.

Terms

a(0) =4a(1) =22a(2) =110a(3) =453a(4) =1482a(5) =4083a(6) =9926a(7) =21959a(8) =45122a(9) =87347a(10) =160922a(11) =284310a(12) =484528a(13) =800206a(14) =1285462a(15) =2014746a(16) =3088824a(17) =4642092a(18) =6851430a(19) =9946827a(20) =14224030a(21) =20059493a(22) =27927926a(23) =38422769a(24) =52279942a(25) =70405249a(26) =93905842a(27) =124126180