Number of nondecreasing arrangements of n numbers x(i) in -n..n with the sum of sign(x(i))*x(i)^2 zero.
A187995
Number of nondecreasing arrangements of n numbers x(i) in -n..n with the sum of sign(x(i))*x(i)^2 zero.
Terms
- a(0) =1a(1) =3a(2) =4a(3) =17a(4) =45a(5) =176a(6) =644a(7) =2983a(8) =13675a(9) =67487a(10) =340192a(11) =1775300a(12) =9438436a(13) =51112686a(14) =281006680a(15) =1565898705a(16) =8826775421a(17) =50268025897a(18) =288898607594
External references
- oeis: A187995