Number T(n,k) of defective (binary) heaps on n elements with k defects; triangle T(n,k), n>=0, 0<=k<=max(0,n-1), read by rows.
A306343
Number T(n,k) of defective (binary) heaps on n elements with k defects; triangle T(n,k), n>=0, 0<=k<=max(0,n-1), read by rows.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =2a(5) =2a(6) =2a(7) =3a(8) =9a(9) =9a(10) =3a(11) =8a(12) =28a(13) =48a(14) =28a(15) =8a(16) =20a(17) =90a(18) =250a(19) =250a(20) =90a(21) =20a(22) =80a(23) =360a(24) =1200a(25) =1760a(26) =1200a(27) =360a(28) =80a(29) =210
External references
- oeis: A306343