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A147737
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Number of permutations of 1..n with all sums of 2 through 3 adjacent terms squared respectively unique.
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0
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1, 2, 6, 24, 120, 720, 4824, 34968, 300284, 2970424, 30732800, 363532816, 4539439318, 61773731104, 919276818482
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OFFSET
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1,2
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LINKS
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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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