Number of defective (binary) heaps on 2n elements from the set {0,1} where exactly n ancestor-successor pairs do not have the correct order.
A372642
Number of defective (binary) heaps on 2n elements from the set {0,1} where exactly n ancestor-successor pairs do not have the correct order.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =8a(4) =33a(5) =112a(6) =370a(7) =1186a(8) =4338a(9) =14999a(10) =52175a(11) =179159a(12) =649132a(13) =2415766a(14) =8994203a(15) =33305573a(16) =120968991a(17) =431067336a(18) =1538631892a(19) =5509192918a(20) =19859364136a(21) =72330631743a(22) =265219210010a(23) =977508697125
External references
- oeis: A372642