Number of (n+1) X (1+1) 0..4 arrays with every 2 X 2 subblock having its diagonal sum differing from its antidiagonal sum by 2, with no adjacent elements equal (constant-stress tilted 1 X 1 tilings).
A234914
Number of (n+1) X (1+1) 0..4 arrays with every 2 X 2 subblock having its diagonal sum differing from its antidiagonal sum by 2, with no adjacent elements equal (constant-stress tilted 1 X 1 tilings).
Terms
- a(0) =40a(1) =120a(2) =376a(3) =1200a(4) =3848a(5) =12360a(6) =39720a(7) =127664a(8) =410344a(9) =1318968a(10) =4239576a(11) =13627344a(12) =43802632a(13) =140795656a(14) =452562248a(15) =1454679760a(16) =4675805864a(17) =15029535096a(18) =48309731384a(19) =155282923376a(20) =499128966408
External references
- oeis: A234914