Number of nondecreasing arrangements of n numbers x(i) in -(n+3)..(n+3) with the sum of sign(x(i))*x(i)^2 zero.

A187998

Number of nondecreasing arrangements of n numbers x(i) in -(n+3)..(n+3) with the sum of sign(x(i))*x(i)^2 zero.

Terms

    a(0) =1a(1) =6a(2) =9a(3) =46a(4) =117a(5) =636a(6) =2596a(7) =13343a(8) =66452a(9) =354806a(10) =1898800a(11) =10452050a(12) =58080269a(13) =327389928a(14) =1863061322a(15) =10707246833a(16) =62028855007a(17) =362078074528

External references