A347800 - OEIS

%I #7 Sep 14 2021 06:57:37

%S 1,0,1,1,2,1,7,1,48,50,796,777,24823,9315,1501873,2585314,200614419,

%T 382810931,52597087873,48712723680,27115688491527

%N Number of tilings of an n X n square using integer-sided square tiles of area > 1.

%F a(n) = A226206(n,n).

%e a(4) = 2:

%e   ._._._._.   ._._._._.

%e   |       |   |   |   |

%e   |       |   |___|___|

%e   |       |   |   |   |

%e   |_______|   |___|___|   .

%Y Main diagonal of A226206.

%Y Cf. A045846.

%K nonn,more

%O 0,5

%A _Alois P. Heinz_, Sep 14 2021