Number of n X 3 0..2 arrays with no element equal to any value at offset (0,-1) (-1,-1) or (-2,0) and new values introduced in order 0..2.
A274890
Number of n X 3 0..2 arrays with no element equal to any value at offset (0,-1) (-1,-1) or (-2,0) and new values introduced in order 0..2.
Terms
- a(0) =2a(1) =12a(2) =16a(3) =38a(4) =84a(5) =192a(6) =436a(7) =990a(8) =2253a(9) =5121a(10) =11645a(11) =26483a(12) =60215a(13) =136936a(14) =311381a(15) =708076a(16) =1610154a(17) =3661438a(18) =8326047a(19) =18933223a(20) =43053720a(21) =97903198a(22) =222629593a(23) =506254676a(24) =1151211539a(25) =2617828789a(26) =5952883022a(27) =13536720098a(28) =30782192928
External references
- oeis: A274890