Number of (n+2) X (4+2) 0..1 arrays with no 3 X 3 subblock diagonal sum one and no antidiagonal sum two.

A254850

Number of (n+2) X (4+2) 0..1 arrays with no 3 X 3 subblock diagonal sum one and no antidiagonal sum two.

Terms

    a(0) =4624a(1) =6889a(2) =13456a(3) =37636a(4) =99856a(5) =271441a(6) =729316a(7) =1996569a(8) =5466244a(9) =15202201a(10) =41550916a(11) =113891584a(12) =307932304a(13) =843379681a(14) =2298435364a(15) =6356553984a(16) =17355427600a(17) =47726519296a(18) =129502098496a(19) =355212424009a(20) =966505272100

External references