Half the number of length n integer sequences with sum zero and sum of squares 72.
A157538
Half the number of length n integer sequences with sum zero and sum of squares 72.
Terms
- a(0) =1a(1) =3a(2) =18a(3) =210a(4) =2565a(5) =32193a(6) =299299a(7) =2161092a(8) =14903940a(9) =101124595a(10) =666560697a(11) =4246100664a(12) =25977358680a(13) =152079371640a(14) =852145833870
External references
- oeis: A157538