Number of (n+1) X (2+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.
A250777
Number of (n+1) X (2+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) =21a(1) =46a(2) =96a(3) =196a(4) =396a(5) =796a(6) =1596a(7) =3196a(8) =6396a(9) =12796a(10) =25596a(11) =51196a(12) =102396a(13) =204796a(14) =409596a(15) =819196a(16) =1638396a(17) =3276796a(18) =6553596a(19) =13107196a(20) =26214396a(21) =52428796a(22) =104857596a(23) =209715196a(24) =419430396a(25) =838860796a(26) =1677721596a(27) =3355443196
External references
- oeis: A250777