Braid numbers B((2)^n->(2)^n).A214624Braid numbers B((2)^n->(2)^n).Terms a(0) =1a(1) =1a(2) =16a(3) =504a(4) =28800a(5) =2620800a(6) =348364800a(7) =63707212800External referencesoeis: A214624