Number of nX3 0..3 arrays with no element equal to one plus the sum of elements to its left or zero plus the sum of 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.
A241250
Number of nX3 0..3 arrays with no element equal to one plus the sum of elements to its left or zero plus the sum of 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) =4a(2) =13a(3) =47a(4) =174a(5) =606a(6) =2111a(7) =6647a(8) =21752a(9) =70595a(10) =229009a(11) =744946a(12) =2418238a(13) =7843143a(14) =25449403a(15) =82556576a(16) =267788667a(17) =868709237a(18) =2817909735a(19) =9140802924a(20) =29651305001a(21) =96183371668a(22) =311999852696
External references
- oeis: A241250