Number of arrangements of n+1 numbers x(i) in -5..5 with the sum of x(i)*x(i+1) equal to zero.
A188354
Number of arrangements of n+1 numbers x(i) in -5..5 with the sum of x(i)*x(i+1) equal to zero.
Terms
- a(0) =21a(1) =231a(2) =749a(3) =8051a(4) =45801a(5) =480363a(6) =3882729a(7) =40629247a(8) =383541193a(9) =4033546763a(10) =40584302909a(11) =428984471067
External references
- oeis: A188354