Number of nX2 0..3 arrays with no element equal to zero plus the sum of elements to its left or one plus the sum of elements above it, modulo 4.
A239813
Number of nX2 0..3 arrays with no element equal to zero plus the sum of elements to its left or one plus the sum of elements above it, modulo 4.
Terms
- a(0) =4a(1) =23a(2) =113a(3) =582a(4) =2981a(5) =15266a(6) =78188a(7) =400542a(8) =2051667a(9) =10509067a(10) =53831920a(11) =275740995a(12) =1412438656a(13) =7234951864a(14) =37059718148a(15) =189831642853a(16) =972377820507
External references
- oeis: A239813