Number of n X 2 0..3 arrays with no element equal to zero plus the sum of elements to its left or two plus the sum of elements above it or two plus the sum of the elements diagonally to its northwest, modulo 4.
A240290
Number of n X 2 0..3 arrays with no element equal to zero plus the sum of elements to its left or two plus the sum of elements above it or two plus the sum of the elements diagonally to its northwest, modulo 4.
Terms
- a(0) =4a(1) =6a(2) =24a(3) =56a(4) =230a(5) =552a(6) =2270a(7) =5456a(8) =22416a(9) =53864a(10) =221258a(11) =531640a(12) =2183802a(13) =5247248a(14) =21554008a(15) =51790104a(16) =212737190a(17) =511166312a(18) =2099707822a(19) =5045191696a(20) =20724034720a(21) =49795846120a(22) =204545417674a(23) =491483066744
External references
- oeis: A240290