Number of 3Xn 0..3 arrays with no element equal to zero 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 one plus the sum of the elements antidiagonally to its northeast, modulo 4.
A239860
Number of 3Xn 0..3 arrays with no element equal to zero 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 one plus the sum of the elements antidiagonally to its northeast, modulo 4.
Terms
- a(0) =4a(1) =5a(2) =44a(3) =78a(4) =255a(5) =742a(6) =1382a(7) =5647a(8) =14755a(9) =33946a(10) =120389a(11) =305123a(12) =717503a(13) =2451925a(14) =6276842a(15) =15461619a(16) =51283453a(17) =130329061a(18) =331984698a(19) =1067700153a(20) =2718467454a(21) =7099921104a(22) =22241389875a(23) =56803646347a(24) =151320850227a(25) =463374925294
External references
- oeis: A239860