Number of (n+1) X (1+1) 0..1 arrays with no 2 X 2 subblock having the minimum of its diagonal elements greater than the absolute difference of its antidiagonal elements.
A251221
Number of (n+1) X (1+1) 0..1 arrays with no 2 X 2 subblock having the minimum of its diagonal elements greater than the absolute difference of its antidiagonal elements.
Terms
- a(0) =14a(1) =49a(2) =171a(3) =597a(4) =2084a(5) =7275a(6) =25396a(7) =88654a(8) =309479a(9) =1080349a(10) =3771351a(11) =13165272a(12) =45958169a(13) =160433700a(14) =560052166a(15) =1955065729a(16) =6824867819a(17) =23824682749a(18) =83168718156a(19) =290330652147
External references
- oeis: A251221