Number of n X 3 0..1 arrays avoiding 0 0 0 and 0 1 0 horizontally and 0 1 1 and 1 1 0 vertically.
A208103
Number of n X 3 0..1 arrays avoiding 0 0 0 and 0 1 0 horizontally and 0 1 1 and 1 1 0 vertically.
Terms
- a(0) =6a(1) =36a(2) =78a(3) =171a(4) =406a(5) =990a(6) =2485a(7) =6328a(8) =16290a(9) =42195a(10) =109746a(11) =286146a(12) =747253a(13) =1953276a(14) =5108806a(15) =13367035a(16) =34982430a(17) =91564278a(18) =239684565a(19) =627447600a(20) =1642590586a(21) =4300214691a(22) =11257876378a(23) =29473127866a(24) =77161043541a(25) =202009252500
External references
- oeis: A208103