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

A188002

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

Terms

    a(0) =1a(1) =1a(2) =2a(3) =1a(4) =3a(5) =3a(6) =1a(7) =4a(8) =4a(9) =12a(10) =1a(11) =5a(12) =5a(13) =17a(14) =25a(15) =1a(16) =6a(17) =8a(18) =25a(19) =45a(20) =106a(21) =1a(22) =7a(23) =9a(24) =34a(25) =64a(26) =176a(27) =376a(28) =1a(29) =8

External references