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%I #9 Sep 12 2015 11:00:24
%S 1,2,5,24,125,796,5635,48042,453947,4834872,56433455,727449366,
%T 10099103269,152097526360,2449915208271,42295879864692
%N Number of ways to place n nonattacking composite pieces bishop + semi-rook on an n X n board.
%C Two semi-rooks do not attack each other if they are in the same column.
%H V. Kotesovec, <a href="https://oeis.org/wiki/User:Vaclav_Kotesovec">Non-attacking chess pieces</a>
%Y Cf. A088789, A187235, A002465, A099152, A000170.
%K nonn,hard
%O 1,2
%A _Vaclav Kotesovec_, Dec 22 2011