id:A023429 - OEIS Search Results

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Generalized Catalan Numbers.

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1, 1, 1, 1, 1, 1, 1, 2, 4, 7, 11, 17, 27, 44, 73, 122, 204, 340, 566, 945, 1586, 2674, 4521, 7656, 12982, 22047, 37509, 63934, 109166, 186685, 319679, 548091, 940819, 1616830, 2781706 (list; graph; listen)

	OFFSET	`0,8`
	MATHEMATICA	`Clear[ a ]; a[ 0 ]=1; a[ n_Integer ] := a[ n ]=a[ n-1 ]+Sum[ a[ k ]*a[ n-4-k ], {k, 3, n-4} ];`
	CROSSREFS	`Cf. A000108, A001006, A004148, A006318.` `Sequence in context: A006999 A005252 A023430 this_sequence A023428 A093911 A152398` `Adjacent sequences: A023426 A023427 A023428 this_sequence A023430 A023431 A023432`
	KEYWORD	`nonn,easy`
	AUTHOR	`Olivier Gerard (olivier.gerard(AT)gmail.com)`

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Last modified December 16 13:01 EST 2009. Contains 170825 sequences.

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