Number of (n+1)X(2+1) 0..2 arrays with nondecreasing sum of every two consecutive values in every row and column.
A250437
Number of (n+1)X(2+1) 0..2 arrays with nondecreasing sum of every two consecutive values in every row and column.
Terms
- a(0) =324a(1) =2160a(2) =14400a(3) =60000a(4) =250000a(5) =787500a(6) =2480625a(7) =6482700a(8) =16941456a(9) =38723328a(10) =88510464a(11) =182891520a(12) =377913600a(13) =721710000a(14) =1378265625a(15) =2470668750a(16) =4428902500a(17) =7537186800a(18) =12826921536a(19) =20901168288a(20) =34057964304a(21) =53488469580a(22) =84004327225
External references
- oeis: A250437