The distance between n! and the nearest perfect square.

Terms

a(0) =0a(1) =0a(2) =1a(3) =2a(4) =1a(5) =1a(6) =9a(7) =1a(8) =81a(9) =476a(10) =225a(11) =324a(12) =4604a(13) =74879a(14) =176400a(15) =215296a(16) =3444736a(17) =11551671a(18) =45680444a(19) =255004929a(20) =1158920361a(21) =2657058876a(22) =24923993276a(23) =130518272975a(24) =97216010329