id:A114901 - OEIS Search Results

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Number of compositions of n such that each part is adjacent to an equal part.

+0
1

1, 0, 1, 1, 2, 1, 5, 3, 10, 10, 21, 22, 49, 51, 105, 126, 233, 292, 529, 678, 1181, 1585, 2654, 3654, 6016, 8416, 13606, 19395, 30840, 44517, 70087, 102070, 159304, 233941, 362429, 535520, 825358, 1225117, 1880220, 2801749, 4285086, 6404354 (list; graph; listen)

	OFFSET	`0,5`
	LINKS	`N. J. A. Sloane, Transforms`
	FORMULA	`INVERT(iMOEBIUS(iINVERT(A000012 shifted right 2 places)))`
	EXAMPLE	`The 5 compositions of 6 are 3+3, 2+2+2, 2+2+1+1, 1+1+2+2, 1+1+1+1+1+1.`
	CROSSREFS	`Cf. A003242, A007690.` `Sequence in context: A082748 A085261 A131119 this_sequence A113178 A108362 A141506` `Adjacent sequences: A114898 A114899 A114900 this_sequence A114902 A114903 A114904`
	KEYWORD	`nonn`
	AUTHOR	`Christian G. Bower (bowerc(AT)usa.net), Jan 05 2006`

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Last modified December 16 17:18 EST 2009. Contains 170825 sequences.

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