Number of 3Xn 0..3 arrays with no element equal to one plus the sum of elements to its left or zero plus the sum of the elements above it or one plus the sum of the elements diagonally to its northwest or zero plus the sum of the elements antidiagonally to its northeast, modulo 4.
A241257
Number of 3Xn 0..3 arrays with no element equal to one plus the sum of elements to its left or zero plus the sum of the elements above it or one plus the sum of the elements diagonally to its northwest or zero plus the sum of the elements antidiagonally to its northeast, modulo 4.
Terms
- a(0) =4a(1) =17a(2) =13a(3) =34a(4) =71a(5) =135a(6) =356a(7) =734a(8) =1705a(9) =3914a(10) =8291a(11) =19714a(12) =42700a(13) =93528a(14) =214479a(15) =462299a(16) =1030477a(17) =2304077a(18) =5035291a(19) =11240675a(20) =24870524a(21) =54876698a(22) =121998539a(23) =269425049a(24) =596725510a(25) =1322494224a(26) =2923575132a(27) =6478965125a(28) =14341026682
External references
- oeis: A241257