Number of (n+1) X (2+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.
A250791
Number of (n+1) X (2+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) =24a(1) =66a(2) =180a(3) =490a(4) =1336a(5) =3646a(6) =9956a(7) =27194a(8) =74288a(9) =202950a(10) =554460a(11) =1514802a(12) =4138504a(13) =11306590a(14) =30890164a(15) =84393482a(16) =230567264a(17) =629921462a(18) =1720977420a(19) =4701797730a(20) =12845550264a(21) =35094695950a(22) =95880492388a(23) =261950376634a(24) =715661738000
External references
- oeis: A250791