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 A175176 Number of vector sums of two permutations of 1,2,...,n. 2
 1, 1, 3, 19, 201, 3081, 62663, 1598185, 49158651, 1772832643, 73394322615, 3431751900897, 178904412061235, 10290301519034057, 647401635395456919, 44227879174393279133 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,3 COMMENTS 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 a(n) <= A362968(n). - Max Alekseyev, Jun 19 2023 LINKS Table of n, a(n) for n=0..15. EXAMPLE 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. CROSSREFS Cf. A019589, A362968. Sequence in context: A288693 A195895 A127502 * A362968 A233336 A208897 Adjacent sequences: A175173 A175174 A175175 * A175177 A175178 A175179 KEYWORD nonn,more AUTHOR R. H. Hardin, Feb 28 2010 EXTENSIONS a(0)=1 prepended by Alois P. Heinz, Jun 19 2023 a(11)-a(15) from Max Alekseyev, Jul 2 2023 STATUS approved

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Last modified December 11 00:22 EST 2023. Contains 367717 sequences. (Running on oeis4.)