1/4 the number of arrangements of n+1 nonzero numbers x(i) in -4..4 with the sum of sign(x(i))*(|x(i)| mod x(i+1)) equal to zero.
A189946
1/4 the number of arrangements of n+1 nonzero numbers x(i) in -4..4 with the sum of sign(x(i))*(|x(i)| mod x(i+1)) equal to zero.
Terms
- a(0) =8a(1) =29a(2) =159a(3) =1246a(4) =9884a(5) =73992a(6) =542353a(7) =4014514a(8) =30195535a(9) =229483051a(10) =1753032755a(11) =13435104833a(12) =103277494510a(13) =796249956004
External references
- oeis: A189946