Number of -3..3 arrays of n elements with first and second differences also in -3..3.
A201083
Number of -3..3 arrays of n elements with first and second differences also in -3..3.
Terms
- a(0) =7a(1) =37a(2) =153a(3) =651a(4) =2771a(5) =11817a(6) =50391a(7) =214867a(8) =916173a(9) =3906507a(10) =16657167a(11) =71025391a(12) =302848889a(13) =1291333199a(14) =5506183213a(15) =23478102983a(16) =100109512887a(17) =426862194475
External references
- oeis: A201083