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A260356
a(n) is the minimal value of Sum_{i=1..n} Product_{j=1..5} r_j(i), where each r_j is a permutation of {1,2,...,n}.
3
1, 12, 60, 214, 600, 1443, 3089
OFFSET
1,2
COMMENTS
See Wu link for sets of permutations that achieve the value of a(n).
CROSSREFS
Cf. A000292 (two permutations), A070735 (three permutations), A070736 (four permutations), A260357 (six permutations), A260358 (seven permutations), A260359 (eight permutations), A260355.
Sequence in context: A012581 A012288 A012582 * A120571 A086950 A370700
KEYWORD
nonn,more
AUTHOR
Chai Wah Wu, Jul 28 2015
STATUS
approved