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A260358
a(n) is the minimal value of Sum_{i=1..n} Product_{j=1..7} r_j(i), where each r_j is a permutation of {1,2,...,n}.
3
1, 24, 198, 1043, 4074
OFFSET
1,2
COMMENTS
See arXiv link for sets of permutations that achieve the value of a(n).
CROSSREFS
Cf. A000292 (two permutations), A070735 (three permutations), A070736 (four permutations), A260356 (five permutations), A260357 (six permutations), A260359 (eight permutations), A260355.
Sequence in context: A211151 A125361 A126519 * A198396 A225296 A048355
KEYWORD
nonn,more
AUTHOR
Chai Wah Wu, Jul 28 2015
STATUS
approved