Number of arrangements of 7 nonzero numbers x(i) in -n..n with the sum of trunc(x(i)/x(i+1)) equal to zero.

A189550

Number of arrangements of 7 nonzero numbers x(i) in -n..n with the sum of trunc(x(i)/x(i+1)) equal to zero.

Terms

    a(0) =40a(1) =2000a(2) =31280a(3) =204544a(4) =911144a(5) =3022220a(6) =8655424a(7) =21284040a(8) =47231344a(9) =96369040a(10) =187026380a(11) =335425808a(12) =582302520a(13) =973424372a(14) =1563214444a(15) =2426917164a(16) =3699260196a(17) =5472064152a(18) =7976593144a(19) =11351136420a(20) =15868645560a(21) =21892595476

External references