Number of 6Xn 0..1 arrays avoiding 0 0 0 and 0 1 1 horizontally and 0 0 1 and 0 1 0 vertically.
A207246
Number of 6Xn 0..1 arrays avoiding 0 0 0 and 0 1 1 horizontally and 0 0 1 and 0 1 0 vertically.
Terms
- a(0) =21a(1) =441a(2) =2491a(3) =13494a(4) =58026a(5) =197256a(6) =683257a(7) =2037721a(8) =5952936a(9) =16732138a(10) =44859931a(11) =119159921a(12) =307712676a(13) =784050794a(14) =1976285122a(15) =4919758858a(16) =12172588913a(17) =29902600211a(18) =73076993300a(19) =177908921984a(20) =431510277616
External references
- oeis: A207246