Number of noncongruent integer-sided 4-dimensional simplices with largest side n.

Terms

a(0) =1a(1) =6a(2) =56a(3) =336a(4) =1840a(5) =7925a(6) =29183a(7) =91621a(8) =256546a(9) =648697a(10) =1508107a(11) =3267671a(12) =6679409a(13) =12957976a(14) =24015317a(15) =42810244a(16) =73793984a(17) =123240964a(18) =200260099a(19) =317487746a(20) =492199068a(21) =747720800a(22) =1115115145a(23) =1634875673a(24) =2360312092a(25) =3358519981a(26) =4716186332a(27) =6541418450