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A264320
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Number of permutations of [n] with exactly one occurrence of the consecutive pattern 3412.
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2
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1, 10, 88, 794, 7639, 79164, 885128, 10657588, 137752283, 1904555934, 28068929900, 439495830750, 7288494061255, 127654030808304, 2355066281798588, 45655570757683888, 927984709909530539, 19735811069218548106, 438344811235148801632, 10149979837759608190794
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history;
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internal format)
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OFFSET
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4,2
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LINKS
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EXAMPLE
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a(4) = 1: 3412.
a(5) = 10: 14523, 24513, 34125, 34512, 35124, 43512, 45123, 45132, 45231, 53412.
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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