Number of 2 X n 0..3 arrays with no element equal to one plus the sum of elements to its left or two plus the sum of the elements above it or zero plus the sum of the elements diagonally to its northwest, modulo 4.
A240285
Number of 2 X n 0..3 arrays with no element equal to one plus the sum of elements to its left or two plus the sum of the elements above it or zero plus the sum of the elements diagonally to its northwest, modulo 4.
Terms
- a(0) =2a(1) =8a(2) =19a(3) =76a(4) =181a(5) =741a(6) =1779a(7) =7308a(8) =17561a(9) =72140a(10) =173343a(11) =712043a(12) =1710905a(13) =7027848a(14) =16886555a(15) =69364556a(16) =166669597a(17) =684625413a(18) =1645022411a(19) =6757226212a(20) =16236307329a(21) =66693560300a(22) =160251722711a(23) =658262849419
External references
- oeis: A240285