Number of arrangements of n+1 numbers x(i) in -4..4 with the sum of x(i)*x(i+1) equal to zero.
A188353
Number of arrangements of n+1 numbers x(i) in -4..4 with the sum of x(i)*x(i+1) equal to zero.
Terms
- a(0) =17a(1) =153a(2) =497a(3) =4201a(4) =22229a(5) =181449a(6) =1264985a(7) =10396729a(8) =81850801a(9) =684867741a(10) =5680170701a(11) =48268778269a(12) =410276328441
External references
- oeis: A188353