id:A115122 - OEIS Search Results

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Number of imprimitive (periodic) 2n-bead black-white complementable necklaces with n black beads.

+0
1

0, 0, 1, 1, 2, 1, 4, 1, 7, 3, 16, 1, 49, 1, 129, 17, 415, 1, 1408, 1, 4659, 130, 16081, 1, 56858, 15, 200171, 1367 (list; graph; listen)

	OFFSET	`0,5`
	COMMENT	`a(p)=1 for prime p.`
	FORMULA	`a(n)=A045629(n) - A045632(n).`
	CROSSREFS	`Sequence in context: A108952 A088522 A115124 this_sequence A097360 A072345 A115120` `Adjacent sequences: A115119 A115120 A115121 this_sequence A115123 A115124 A115125`
	KEYWORD	`easy,nonn`
	AUTHOR	`Valery A. Liskovets (liskov(AT)im.bas-net.by), Jan 17 2006`

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Last modified November 18 20:14 EST 2008. Contains 147244 sequences.