Number of nondecreasing arrangements of n numbers x(i) in -(n+4)..(n+4) with the sum of sign(x(i))*x(i)^2 zero.

A187999

Number of nondecreasing arrangements of n numbers x(i) in -(n+4)..(n+4) with the sum of sign(x(i))*x(i)^2 zero.

Terms

    a(0) =1a(1) =7a(2) =10a(3) =57a(4) =159a(5) =862a(6) =3796a(7) =20224a(8) =105208a(9) =573982a(10) =3155734a(11) =17684829a(12) =100137017a(13) =572950408a(14) =3306528276a(15) =19236540159a(16) =112697134709a(17) =664463497819

External references