Number of (n+1) X (4+1) 0..2 arrays with no 2 X 2 subblock having the sum of its diagonal elements greater than the absolute difference of its antidiagonal elements.
A251084
Number of (n+1) X (4+1) 0..2 arrays with no 2 X 2 subblock having the sum of its diagonal elements greater than the absolute difference of its antidiagonal elements.
Terms
- a(0) =420a(1) =1306a(2) =2362a(3) =4718a(4) =8512a(5) =15780a(6) =28616a(7) =52934a(8) =98550a(9) =186788a(10) =358250a(11) =695798a(12) =1363076a(13) =2688996a(14) =5329268a(15) =10596902a(16) =21115770a(17) =42135172a(18) =84151526a(19) =168159190a(20) =336144664a(21) =672082436a(22) =1343919232a(23) =2687549958a(24) =5374762142a(25) =10749132260
External references
- oeis: A251084