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A175176
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Number of vector sums of two permutations of 1,2,...,n.
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2
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1, 1, 3, 19, 201, 3081, 62663, 1598185, 49158651, 1772832643, 73394322615, 3431751900897, 178904412061235, 10290301519034057, 647401635395456919, 44227879174393279133
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OFFSET
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0,3
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COMMENTS
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Also, number of vector differences of two permutations of 1,2,...,n.
Number of distinct sums up to the order of components is given by A019589. - Max Alekseyev, Jun 19 2023
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LINKS
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EXAMPLE
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The permutation sums for n=2 are (1,2) + (1,2) = (2,4); (1,2) + (2,1) = (2,1) + (1,2) = (3,3); (2,1) + (2,1) = (4,2); so a(2)=3.
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CROSSREFS
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KEYWORD
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nonn,more
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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