1/4 the number of arrangements of n+1 nonzero numbers x(i) in -7..7 with the sum of sign(x(i))*(|x(i)| mod x(i+1)) equal to zero.
A189949
1/4 the number of arrangements of n+1 nonzero numbers x(i) in -7..7 with the sum of sign(x(i))*(|x(i)| mod x(i+1)) equal to zero.
Terms
- a(0) =16a(1) =75a(2) =889a(3) =13034a(4) =168737a(5) =2095080a(6) =26586582a(7) =346371666a(8) =4569825052a(9) =60616719909a(10) =807520929855
External references
- oeis: A189949