Number of length 6+2 0..n arrays with the sum of second differences multiplied by some arrangement of +-1 equal to zero.
A250565
Number of length 6+2 0..n arrays with the sum of second differences multiplied by some arrangement of +-1 equal to zero.
Terms
- a(0) =128a(1) =3113a(2) =30780a(3) =177421a(4) =744564a(5) =2457921a(6) =6924692a(7) =17094253a(8) =38304880a(9) =78984989a(10) =152812848a(11) =279129849a(12) =487306780a(13) =816235605a(14) =1321428708a(15) =2073455817
External references
- oeis: A250565