A072707 - OEIS

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A072707

Number of non-unimodal compositions of n into distinct terms.

0, 0, 0, 0, 0, 0, 2, 2, 4, 6, 24, 26, 46, 64, 100, 224, 276, 416, 590, 850, 1144, 2214, 2644, 3938, 5282, 7504, 9776, 13704, 21984, 27632, 38426, 51562, 69844, 91950, 123504, 159658, 246830, 303400, 416068, 540480, 730268, 933176, 1248110 (list; graph; refs; listen; history; internal format)

	OFFSET	`0,7`
	FORMULA	`a(n) =A032020(n)-A072706(k) =sum_k A059204(k)*A060016(n, k)`
	EXAMPLE	`a(6)=2 since 6 can be written as 2+1+3 or 3+1+2.`
	CROSSREFS	`Sequence in context: A069925 A080611 A171421 * A086105 A084701 A113815` `Adjacent sequences: A072704 A072705 A072706 * A072708 A072709 A072710`
	KEYWORD	`nonn`
	AUTHOR	`Henry Bottomley (se16(AT)btinternet.com), Jul 04 2002`

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Last modified February 16 18:43 EST 2012. Contains 205939 sequences.