Number of -n..n arrays x(0..6) of 7 elements with zero sum and nonzero second differences.
A200557
Number of -n..n arrays x(0..6) of 7 elements with zero sum and nonzero second differences.
Terms
- a(0) =142a(1) =4978a(2) =43698a(3) =211374a(4) =737460a(5) =2076774a(6) =5012084a(7) =10807826a(8) =21368704a(9) =39388482a(10) =68614738a(11) =114064374a(12) =182196622a(13) =281328582a(14) =421889370a(15) =616590012a(16) =881040966a(17) =1234022180a(18) =1697613488a(19) =2298081194a(20) =3066132222a(21) =4036964078a(22) =5251498784
External references
- oeis: A200557