

A133129


Number of black/white colorings of a 3 X n rectangle which have no monochromatic 2 by 2 subsquares.


2



8, 50, 322, 2066, 13262, 85126, 546410, 3507314, 22512862, 144506294, 927561722, 5953863490, 38216853518, 245307588134, 1574588362378, 10107019231634
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