Number of -n..n arrays x(0..8) of 9 elements with zero sum and nonzero second differences.
A200559
Number of -n..n arrays x(0..8) of 9 elements with zero sum and nonzero second differences.
Terms
- a(0) =778a(1) =91058a(2) =1639804a(3) =13587804a(4) =72366820a(5) =288237528a(6) =936121220a(7) =2613794508a(8) =6492378076a(9) =14694189538a(10) =30833955936a(11) =60757353766a(12) =113535692414a(13) =202761648044a(14) =348183768616a(15) =577776075892a(16) =930286238568
External references
- oeis: A200559