Number of arrangements of 4 nonzero numbers x(i) in -n..n with the sum of trunc(x(i)/x(i+1)) equal to zero.

A189547

Number of arrangements of 4 nonzero numbers x(i) in -n..n with the sum of trunc(x(i)/x(i+1)) equal to zero.

Terms

    a(0) =0a(1) =44a(2) =192a(3) =544a(4) =1340a(5) =2520a(6) =4620a(7) =7716a(8) =12500a(9) =18896a(10) =27876a(11) =38860a(12) =53492a(13) =71460a(14) =93972a(15) =121328a(16) =155180a(17) =194484a(18) =241980a(19) =296528a(20) =360804a(21) =434048a(22) =519528a(23) =614164a(24) =723528a(25) =845504a(26) =983924a(27) =1136840a(28) =1309496a(29) =1497332

External references