Number of defective (binary) heaps on n elements where two ancestor-successor pairs do not have the correct order.

A324063

Number of defective (binary) heaps on n elements where two ancestor-successor pairs do not have the correct order.

Terms

    a(0) =0a(1) =0a(2) =0a(3) =2a(4) =6a(5) =24a(6) =100a(7) =480a(8) =1890a(9) =8960a(10) =47040a(11) =288000a(12) =1584000a(13) =10644480a(14) =74131200a(15) =615014400a(16) =3783780000a(17) =29520691200a(18) =230015385600

External references