Number of 4Xn 0..3 arrays with no element equal to zero plus the sum of elements to its left or one plus the sum of the elements above it or zero plus the sum of the elements diagonally to its northwest or one plus the sum of the elements antidiagonally to its northeast, modulo 4.
A241400
Number of 4Xn 0..3 arrays with no element equal to zero plus the sum of elements to its left or one plus the sum of the elements above it or zero plus the sum of the elements diagonally to its northwest or one plus the sum of the elements antidiagonally to its northeast, modulo 4.
Terms
- a(0) =7a(1) =28a(2) =97a(3) =480a(4) =1657a(5) =8697a(6) =31654a(7) =92204a(8) =397955a(9) =1440202a(10) =5015494a(11) =20114505a(12) =70074714a(13) =258768285a(14) =999131434a(15) =3471187281a(16) =13084431710a(17) =49495338616a(18) =176036491899a(19) =662243630484
External references
- oeis: A241400