Number of (n+1) X (1+1) 0..1 arrays with every 2 X 2 subblock diagonal minus antidiagonal sum nondecreasing horizontally and vertically.
A253152
Number of (n+1) X (1+1) 0..1 arrays with every 2 X 2 subblock diagonal minus antidiagonal sum nondecreasing horizontally and vertically.
Terms
- a(0) =16a(1) =39a(2) =69a(3) =109a(4) =181a(5) =325a(6) =613a(7) =1189a(8) =2341a(9) =4645a(10) =9253a(11) =18469a(12) =36901a(13) =73765a(14) =147493a(15) =294949a(16) =589861a(17) =1179685a(18) =2359333a(19) =4718629a(20) =9437221a(21) =18874405a(22) =37748773a(23) =75497509a(24) =150994981a(25) =301989925a(26) =603979813a(27) =1207959589a(28) =2415919141a(29) =4831838245
External references
- oeis: A253152