Number of -4..4 arrays of n elements with first through fourth differences also in -4..4.
A202660
Number of -4..4 arrays of n elements with first through fourth differences also in -4..4.
Terms
- a(0) =9a(1) =61a(2) =323a(3) =1279a(4) =3785a(5) =11413a(6) =34171a(7) =102705a(8) =308785a(9) =928115a(10) =2790241a(11) =8389429a(12) =25223913a(13) =75838823a(14) =228021213a(15) =685581997a(16) =2061310319a(17) =6197655253a(18) =18634234069a(19) =56026786211a(20) =168453450193a(21) =506482113541
External references
- oeis: A202660