Where records occur in A152235.

Terms

a(0) =1a(1) =2a(2) =4a(3) =12a(4) =48a(5) =144a(6) =576a(7) =720a(8) =2880a(9) =25920a(10) =129600a(11) =414720a(12) =907200a(13) =14515200a(14) =58060800a(15) =130636800a(16) =522547200a(17) =3265920000a(18) =13063680000a(19) =22861440000a(20) =91445760000a(21) =251475840000