id:A057745 - OEIS Search Results

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Number of distinct chess positions after n plies including differences due to availability of castling and en passant captures.

+0
2

1, 20, 400, 5362, 72078, 822518, 9417683 (list; graph; listen)

	OFFSET	`0,2`
	COMMENT	`Definition: position = position with castling and en passant information, diagram = position without castling and en passant information.`
	LINKS	`Index entries for sequences related to number of chess games`
	CROSSREFS	`Sequence in context: A089957 A019319 A083276 this_sequence A009964 A007577 A048987` `Adjacent sequences: A057742 A057743 A057744 this_sequence A057746 A057747 A057748`
	KEYWORD	`hard,nonn`
	AUTHOR	`Steven J. Edwards (chessnotation(AT)earthlink.net), Oct 29 2000 and Dec 16 2000.`
	EXTENSIONS	`Probably an erroneous version of A083276. - N. J. A. Sloane (njas(AT)research.att.com), Mar 16 2007`

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Last modified November 30 13:13 EST 2009. Contains 167758 sequences.