Number of second differences of arrays of length n + 2 of numbers in 0..3.
A228213
Number of second differences of arrays of length n + 2 of numbers in 0..3.
Terms
- a(0) =13a(1) =103a(2) =625a(3) =3151a(4) =14053a(5) =58975a(6) =242461a(7) =989527a(8) =4017157a(9) =16245775a(10) =65514541a(11) =263652487a(12) =1059392917a(13) =4251920575a(14) =17050729021a(15) =68332056247a(16) =273715645477
External references
- oeis: A228213