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A133793
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Number of n X n binary matrices with every element adjacent to some 0 horizontally or vertically.
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0
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9, 161, 11236, 3270375, 3416753209, 13057656650476, 183641258024619409, 9467975365082755623313, 1790666611784474236947695716, 1242439796942800308861023912760955
(list; graph; refs; listen; history; internal format)
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