Number of (7+1)X(n+1) 0..1 arrays with nondecreasing min(x(i,j),x(i,j-1)) in the i direction and nondecreasing absolute value of x(i,j)-x(i-1,j) in the j direction.
A250804
Number of (7+1)X(n+1) 0..1 arrays with nondecreasing min(x(i,j),x(i,j-1)) in the i direction and nondecreasing absolute value of x(i,j)-x(i-1,j) in the j direction.
Terms
- a(0) =1970a(1) =9956a(2) =37986a(3) =124366a(4) =361344a(5) =968942a(6) =2437366a(7) =5849556a(8) =13519146a(9) =30351918a(10) =66573728a(11) =143373294a(12) =304256334a(13) =638165212a(14) =1326004914a(15) =2734630046a(16) =5605754032a(17) =11435981086a(18) =23239612118a(19) =47079690548a(20) =95137712202a(21) =191866743358
External references
- oeis: A250804