Square roots of squares pertaining to A076123.

Terms

a(0) =1a(1) =4a(2) =12a(3) =36a(4) =180a(5) =1260a(6) =7560a(7) =25200a(8) =277200a(9) =1663200a(10) =21621600a(11) =64864800a(12) =735134400a(13) =6983776800a(14) =146659312800