Number of arrangements of n+1 nonzero numbers x(i) in -2..2 with the sum of trunc(x(i)/x(i+1)) equal to zero.

A189538

Number of arrangements of n+1 nonzero numbers x(i) in -2..2 with the sum of trunc(x(i)/x(i+1)) equal to zero.

Terms

    a(0) =4a(1) =8a(2) =44a(3) =152a(4) =552a(5) =2000a(6) =7628a(7) =28440a(8) =108792a(9) =411888a(10) =1586424a(11) =6066032a(12) =23474384a(13) =90378912a(14) =351072012a(15) =1358520600a(16) =5293045208a(17) =20561697200a(18) =80309986856a(19) =312934745552

External references