Jordan function J_8(n).

Terms

a(0) =1a(1) =255a(2) =6560a(3) =65280a(4) =390624a(5) =1672800a(6) =5764800a(7) =16711680a(8) =43040160a(9) =99609120a(10) =214358880a(11) =428236800a(12) =815730720a(13) =1470024000a(14) =2562493440a(15) =4278190080a(16) =6975757440a(17) =10975240800a(18) =16983563040a(19) =25499934720a(20) =37817088000