Number of 5Xn 0..3 arrays with no element equal to zero plus the sum of elements to its left or two plus the sum of the elements above it or one plus the sum of the elements diagonally to its northwest, modulo 4.
A239989
Number of 5Xn 0..3 arrays with no element equal to zero plus the sum of elements to its left or two plus the sum of the elements above it or one plus the sum of the elements diagonally to its northwest, modulo 4.
Terms
- a(0) =7a(1) =40a(2) =261a(3) =1391a(4) =7113a(5) =31226a(6) =131242a(7) =514539a(8) =1914507a(9) =6772946a(10) =22897312a(11) =74168162a(12) =230889987a(13) =691544987a(14) =1994352403a(15) =5541664374a(16) =14851119427a(17) =38433580993a(18) =96194422578a(19) =233234971795a(20) =548761214881
External references
- oeis: A239989