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%I #15 Sep 23 2018 22:34:08
%S 1,1,2,6,19,63,219,787,2897,10869,41414,159822,623391,2453727,9733866,
%T 38877318,156206233,630947421,2560537092,10435207116,42689715279,
%U 175243923783,721649457417,2980276087005,12340456995177,51222441676513
%N Duplicate of A071969.
%K dead
%O 0,3
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