Number of (n+1)X(6+1) 0..1 arrays with nondecreasing sum of every two consecutive values in every row and column.
A250430
Number of (n+1)X(6+1) 0..1 arrays with nondecreasing sum of every two consecutive values in every row and column.
Terms
- a(0) =400a(1) =3000a(2) =22500a(3) =105000a(4) =490000a(5) =1715000a(6) =6002500a(7) =17287200a(8) =49787136a(9) =124467840a(10) =311169600a(11) =698544000a(12) =1568160000a(13) =3234330000a(14) =6670805625a(15) =12847477500a(16) =24743290000a(17) =45032787800a(18) =81959673796a(19) =142244061960
External references
- oeis: A250430