Number of nX5 0..1 arrays avoiding 0 0 0 and 0 1 0 horizontally and 0 0 0 and 0 1 1 vertically.
A207905
Number of nX5 0..1 arrays avoiding 0 0 0 and 0 1 0 horizontally and 0 0 0 and 0 1 1 vertically.
Terms
- a(0) =15a(1) =225a(2) =1071a(3) =4089a(4) =13865a(5) =39831a(6) =110775a(7) =289467a(8) =730377a(9) =1811997a(10) =4393069a(11) =10558951a(12) =25146429a(13) =59475625a(14) =140190519a(15) =329138641a(16) =771108603a(17) =1803405621a(18) =4211351857a(19) =9825749755a(20) =22905455175a(21) =53364801587a(22) =124272402673a(23) =289284276825
External references
- oeis: A207905