Number of (4+1) X (n+1) 0..1 arrays with nondecreasing 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.
A250772
Number of (4+1) X (n+1) 0..1 arrays with nondecreasing 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) =72a(1) =130a(2) =216a(3) =350a(4) =572a(5) =962a(6) =1680a(7) =3046a(8) =5700a(9) =10922a(10) =21272a(11) =41870a(12) =82956a(13) =165010a(14) =328992a(15) =656822a(16) =1312340a(17) =2623226a(18) =5244840a(19) =10487902a(20) =20973852a(21) =41945570a(22) =83888816a(23) =167775110a(24) =335547492a(25) =671092042a(26) =1342180920a(27) =2684358446a(28) =5368713260
External references
- oeis: A250772