Number of (n+1)X(3+1) 0..2 arrays with nondecreasing sum of every two consecutive values in every row and column.
A250438
Number of (n+1)X(3+1) 0..2 arrays with nondecreasing sum of every two consecutive values in every row and column.
Terms
- a(0) =1296a(1) =14400a(2) =160000a(3) =1000000a(4) =6250000a(5) =27562500a(6) =121550625a(7) =423536400a(8) =1475789056a(9) =4337012736a(10) =12745506816a(11) =32920473600a(12) =85030560000a(13) =198470250000a(14) =463250390625a(15) =996503062500
External references
- oeis: A250438