Number of 4Xn 0..1 arrays avoiding 0 0 0 and 1 0 1 horizontally and 0 1 1 and 1 0 1 vertically.
A207764
Number of 4Xn 0..1 arrays avoiding 0 0 0 and 1 0 1 horizontally and 0 1 1 and 1 0 1 vertically.
Terms
- a(0) =9a(1) =81a(2) =193a(3) =663a(4) =1664a(5) =4018a(6) =11509a(7) =30943a(8) =79178a(9) =213444a(10) =574517a(11) =1510235a(12) =4016905a(13) =10742833a(14) =28499913a(15) =75702647a(16) =201719465a(17) =536397481a(18) =1425655190a(19) =3793651190a(20) =10091485607a(21) =26833849671a(22) =71376964346a(23) =189863830540a(24) =504956635718
External references
- oeis: A207764