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A297520
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Number of 2 X n 0..1 arrays with every 1 horizontally, diagonally or antidiagonally adjacent to 1 or 3 neighboring 1s.
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1
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1, 5, 17, 33, 65, 193, 529, 1185, 2737, 7169, 18257, 43425, 104945, 264001, 656785, 1597665, 3913009, 9708161, 23980241, 58804257, 144593009, 357011905, 879991825, 2164014945, 5327178673, 13131288833, 32347250513, 79624144545, 196075443953
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