id:A050190 - OEIS Search Results

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T(n,5), array T as in A050186; a count of aperiodic binary words.

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0, 6, 21, 56, 126, 250, 462, 792, 1287, 2002, 3000, 4368, 6188, 8568, 11628, 15500, 20349, 26334, 33649, 42504, 53125, 65780, 80730, 98280, 118755, 142500, 169911, 201376, 237336, 278256, 324625, 376992, 435897, 501942 (list; graph; listen)

	OFFSET	`5,2`
	FORMULA	`G.f.: x^6(x^9-x^5-4x^4-15x^3+20x^2-15x+6)/[(1-x)^6(1-x^5)^2]. a(n) = A000389(n) - [5 divides n]n/5 = nfloor(C(n-1, 4)/5). - R. Stephan, Aug 18 2004`
	CROSSREFS	`Equals n*A051170(n).` `Sequence in context: A002817 A132366 A015641 this_sequence A008498 A015640 A138780` `Adjacent sequences: A050187 A050188 A050189 this_sequence A050191 A050192 A050193`
	KEYWORD	`nonn`
	AUTHOR	`Clark Kimberling (ck6(AT)evansville.edu)`
	EXTENSIONS	`More terms from R. Stephan, Aug 18 2004`

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

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