Number of (n+1) X (1+1) 0..3 arrays with every 2 X 2 subblock summing to a nonzero multiple of 3.
A251336
Number of (n+1) X (1+1) 0..3 arrays with every 2 X 2 subblock summing to a nonzero multiple of 3.
Terms
- a(0) =85a(1) =455a(2) =2450a(3) =13275a(4) =72375a(5) =397000a(6) =2190625a(7) =12156875a(8) =67831250a(9) =380409375a(10) =2143546875a(11) =12131500000a(12) =68933828125a(13) =393119609375
External references
- oeis: A251336