Number of (n+1) X (4+1) 0..4 arrays with every 2 X 2 subblock having its diagonal sum differing from its antidiagonal sum by 3, with no adjacent elements equal (constant-stress tilted 1 X 1 tilings).
A235013
Number of (n+1) X (4+1) 0..4 arrays with every 2 X 2 subblock having its diagonal sum differing from its antidiagonal sum by 3, with no adjacent elements equal (constant-stress tilted 1 X 1 tilings).
Terms
- a(0) =680a(1) =1112a(2) =1912a(3) =3560a(4) =6856a(5) =13912a(6) =28968a(7) =62600a(8) =138360a(9) =314376a(10) =728008a(11) =1720088a(12) =4123816a(13) =10024648a(14) =24620856a(15) =61022408a(16) =152276808a(17) =382191000a(18) =963411496a(19) =2437205768a(20) =6182237176a(21) =15716144392a(22) =40019084232a(23) =102038360216a(24) =260435212968
External references
- oeis: A235013