Number of (n+2)X3 binary arrays with 3X3 subblock sums nondecreasing rightwards and downwards.
A186832
Number of (n+2)X3 binary arrays with 3X3 subblock sums nondecreasing rightwards and downwards.
Terms
- a(0) =512a(1) =2688a(2) =14112a(3) =74088a(4) =324576a(5) =1421952a(6) =6229504a(7) =24748736a(8) =98322424a(9) =390617891a(10) =1462011696a(11) =5472043776a(12) =20480864256a(13) =73689191424a(14) =265130263296a(15) =953926283584
External references
- oeis: A186832