id:A051732 - OEIS Search Results

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Number of interlacings (or shuffles) required to restore deck of n cards to original order: interlacing is done by keeping first card, putting second at end of deck, keeping next, putting next at end and so on.

+0
2

1, 1, 2, 2, 3, 5, 6, 6, 4, 9, 4, 28, 10, 9, 14, 12, 5, 70, 18, 24, 10, 7, 210, 126, 110, 60, 26, 120, 9, 29, 30, 60, 6, 33, 308, 42, 60, 990, 30, 374, 27, 41, 60, 2618, 840, 840, 420, 1386, 24, 15, 50, 644, 840, 53, 18, 1386, 14, 13300, 2520, 1260, 55, 6930, 50, 60, 7 (list; graph; listen)

	OFFSET	`1,3`
	CROSSREFS	`Cf. A051733.` `Sequence in context: A035537 A101779 A137756 this_sequence A098382 A098180 A117752` `Adjacent sequences: A051729 A051730 A051731 this_sequence A051733 A051734 A051735`
	KEYWORD	`easy,nonn,nice`
	AUTHOR	`Marie-Christine Haton (Marie-Christine.Haton(AT)loria.fr)`

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.

AT&T Labs Research