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A152335
Number of permutations of floor(i*5/2), i=0..n-1, with all sums of 4 adjacent terms unique.
0
1, 2, 6, 24, 120, 640, 4164, 28224, 237168, 2133992, 21136148, 226558932, 2656690332, 33144866692, 444798029884, 6309964631348
OFFSET
1,2
CROSSREFS
Sequence in context: A152348 A152334 A152333 * A152339 A152341 A152346
KEYWORD
nonn
AUTHOR
R. H. Hardin, Dec 02 2008
STATUS
approved