id:A077046 - OEIS Search Results

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Doubly restricted composition numbers: number of compositions of [n^2/2] into exactly n positive integers each strictly less than n.

+0
5

0, 1, 3, 19, 155, 1751, 24017, 398567, 7635987, 167729959, 4123838279, 112835748609, 3386455204288, 110976634957761, 3932912125462725, 150186639579545295, 6137695417757646851, 267654541150392845543 (list; graph; listen)

	OFFSET	`1,3`
	LINKS	`Index entries for sequences related to compositions`
	FORMULA	`a(n) =A077042(n-1, n).`
	EXAMPLE	`a(3)=3 since the compositions of [3^2/2]=4 into exactly 3 positive integers each strictly less than 3 are: 1+1+2, 1+2+1 and 2+1+1.`
	CROSSREFS	`Cf. A077042, A077045, A077047, A077048.` `Sequence in context: A007111 A113013 A105784 this_sequence A054765 A057719 A136474` `Adjacent sequences: A077043 A077044 A077045 this_sequence A077047 A077048 A077049`
	KEYWORD	`nonn`
	AUTHOR	`Henry Bottomley (se16(AT)btinternet.com), Oct 22 2002`

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Last modified November 24 23:16 EST 2009. Contains 167481 sequences.

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