id:A133406 - OEIS Search Results

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Half the number of ways of placing up to n pawns on a length n chessboard row so that the row balances at its middle.

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1, 1, 2, 2, 4, 4, 10, 9, 26, 24, 76, 69, 236, 214, 760, 696, 2522, 2326, 8556, 7942, 29504, 27562, 103130, 96862, 364548, 344004, 1300820, 1232567, 4679472, 4449850, 16952162, 16171118, 61790442, 59107890, 226451036, 217157069, 833918840 (list; graph; listen)

	OFFSET	`1,3`
	COMMENT	`Odd terms are A047653`
	CROSSREFS	`Cf. A047653.` `Sequence in context: A099537 A109525 A114338 this_sequence A005293 A057784 A081164` `Adjacent sequences: A133403 A133404 A133405 this_sequence A133407 A133408 A133409`
	KEYWORD	`nonn`
	AUTHOR	`Ron Hardin (rhhardin(AT)att.net), Nov 24 2007`

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Last modified December 4 20:00 EST 2008. Contains 151309 sequences.

AT&T Labs Research