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A116845
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Number of permutations of length n which avoid the patterns 231, 12534.
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0
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1, 2, 5, 14, 41, 121, 355, 1032, 2973, 8496, 24111, 68017, 190885, 533294, 1484021, 4115186, 11375765, 31358377, 86223943, 236540916, 647556621, 1769374932, 4826148315, 13142564449, 35736448201, 97037995226, 263156279525
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