Number of n X 3 0..2 arrays with no element equal to any value at offset (-1,0) (0,-1) or (-2,-2) and new values introduced in order 0..2.
A274853
Number of n X 3 0..2 arrays with no element equal to any value at offset (-1,0) (0,-1) or (-2,-2) and new values introduced in order 0..2.
Terms
- a(0) =2a(1) =9a(2) =19a(3) =43a(4) =100a(5) =233a(6) =542a(7) =1260a(8) =2929a(9) =6809a(10) =15829a(11) =36798a(12) =85545a(13) =198868a(14) =462312a(15) =1074745a(16) =2498479a(17) =5808259a(18) =13502564a(19) =31389653a(20) =72972090a(21) =169639528a(22) =394364057a(23) =916785205a(24) =2131267029a(25) =4954594734a(26) =11518035349a(27) =26776183608a(28) =62247074860
External references
- oeis: A274853