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

A324064

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

Terms

    a(0) =0a(1) =0a(2) =0a(3) =0a(4) =6a(5) =24a(6) =120a(7) =640a(8) =3150a(9) =16128a(10) =94080a(11) =614400a(12) =3801600a(13) =26864640a(14) =203174400a(15) =1757184000a(16) =11783772000a(17) =95122227200a(18) =794598604800

External references