Number of (7+1)X(n+1) 0..1 arrays with every 2X2 subblock ne-sw antidiagonal difference unequal to its neighbors horizontally and nw+se diagonal sum unequal to its neighbors vertically.
A253704
Number of (7+1)X(n+1) 0..1 arrays with every 2X2 subblock ne-sw antidiagonal difference unequal to its neighbors horizontally and nw+se diagonal sum unequal to its neighbors vertically.
Terms
- a(0) =4456a(1) =2416a(2) =2982a(3) =3136a(4) =4180a(5) =5030a(6) =6558a(7) =8846a(8) =12620a(9) =17170a(10) =22264a(11) =27490a(12) =36614a(13) =48914a(14) =70968a(15) =96312a(16) =131294a(17) =168514a(18) =223910a(19) =300006a(20) =420174a(21) =580192a(22) =795556a(23) =1051418a(24) =1403720a(25) =1862978a(26) =2573560a(27) =3507284a(28) =4848850a(29) =6469278
External references
- oeis: A253704