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A147682 Late-growing permutations: number of permutations of 2 indistinguishable copies of 1..n with every partial sum <= the same partial sum averaged over all permutations. 1
1, 2, 30, 403, 18720, 746192, 71892912, 5873837638, 951265850580, 133244998049858, 32484245570649180, 6956417433946216990, 2375465385671586163800 (list; graph; refs; listen; history; internal format)
OFFSET

1,2

CROSSREFS

Cf. A147681.

Sequence in context: A152277 A083446 A091345 * A077517 A060042 A134362

Adjacent sequences:  A147679 A147680 A147681 * A147683 A147684 A147685

KEYWORD

nonn

AUTHOR

R. H. Hardin (rhhardin(AT)att.net) May 01 2009

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Last modified February 16 09:00 EST 2012. Contains 205904 sequences.