Number of (n+1)X(5+1) 0..1 arrays with every 2X2 subblock sum nondecreasing horizontally, vertically and antidiagonally ne-to-sw.

A253323

Number of (n+1)X(5+1) 0..1 arrays with every 2X2 subblock sum nondecreasing horizontally, vertically and antidiagonally ne-to-sw.

Terms

    a(0) =676a(1) =2797a(2) =11506a(3) =23153a(4) =58505a(5) =98741a(6) =210417a(7) =349857a(8) =705922a(9) =1217364a(10) =2426173a(11) =4388311a(12) =8749975a(13) =16462924a(14) =32895785a(15) =63545030a(16) =127119746a(17) =249438950a(18) =499146913a(19) =988089345a(20) =1977131937a(21) =3932608792a(22) =7867888425a(23) =15689851768

External references