Number of (3+1) X (n+1) 0..1 arrays with every 2 X 2 subblock diagonal minus antidiagonal sum nondecreasing horizontally, vertically and ne-to-sw antidiagonally.
A253437
Number of (3+1) X (n+1) 0..1 arrays with every 2 X 2 subblock diagonal minus antidiagonal sum nondecreasing horizontally, vertically and ne-to-sw antidiagonally.
Terms
- a(0) =69a(1) =73a(2) =85a(3) =120a(4) =192a(5) =336a(6) =624a(7) =1200a(8) =2352a(9) =4656a(10) =9264a(11) =18480a(12) =36912a(13) =73776a(14) =147504a(15) =294960a(16) =589872a(17) =1179696a(18) =2359344a(19) =4718640a(20) =9437232a(21) =18874416a(22) =37748784a(23) =75497520a(24) =150994992a(25) =301989936a(26) =603979824a(27) =1207959600a(28) =2415919152a(29) =4831838256
External references
- oeis: A253437