Number of (n+1) X (3+1) 0..1 arrays with nondecreasing x(i,j)-x(i,j-1) in the i direction and nonincreasing x(i,j)-x(i-1,j) in the j direction.
A250737
Number of (n+1) X (3+1) 0..1 arrays with nondecreasing x(i,j)-x(i,j-1) in the i direction and nonincreasing x(i,j)-x(i-1,j) in the j direction.
Terms
- a(0) =18a(1) =22a(2) =30a(3) =46a(4) =78a(5) =142a(6) =270a(7) =526a(8) =1038a(9) =2062a(10) =4110a(11) =8206a(12) =16398a(13) =32782a(14) =65550a(15) =131086a(16) =262158a(17) =524302a(18) =1048590a(19) =2097166a(20) =4194318a(21) =8388622a(22) =16777230a(23) =33554446a(24) =67108878a(25) =134217742a(26) =268435470a(27) =536870926a(28) =1073741838a(29) =2147483662
External references
- oeis: A250737