Number of (n+1) X (7+1) 0..1 arrays with nondecreasing x(i,j)-x(i,j-1) in the i direction and nondecreasing min(x(i,j),x(i-1,j)) in the j direction.
A250655
Number of (n+1) X (7+1) 0..1 arrays with nondecreasing x(i,j)-x(i,j-1) in the i direction and nondecreasing min(x(i,j),x(i-1,j)) in the j direction.
Terms
- a(0) =81a(1) =169a(2) =345a(3) =697a(4) =1401a(5) =2809a(6) =5625a(7) =11257a(8) =22521a(9) =45049a(10) =90105a(11) =180217a(12) =360441a(13) =720889a(14) =1441785a(15) =2883577a(16) =5767161a(17) =11534329a(18) =23068665a(19) =46137337a(20) =92274681a(21) =184549369a(22) =369098745a(23) =738197497a(24) =1476395001a(25) =2952790009a(26) =5905580025
External references
- oeis: A250655