Sum of the squares of the trinomial coefficients (A027907).
A082758
Sum of the squares of the trinomial coefficients (A027907).
Terms
- a(0) =1a(1) =3a(2) =19a(3) =141a(4) =1107a(5) =8953a(6) =73789a(7) =616227a(8) =5196627a(9) =44152809a(10) =377379369a(11) =3241135527a(12) =27948336381a(13) =241813226151
External references
- oeis: A082758