id:A056491 - OEIS Search Results

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Number of periodic palindromes using exactly five different symbols.

+0
2

0, 0, 0, 0, 0, 0, 0, 60, 120, 960, 1800, 9300, 16800, 71400, 126000, 480060, 834120, 2968560, 5103000, 17355300, 29607600, 97567800, 165528000, 533274060, 901020120, 2855012160, 4809004200, 15050517300 (list; graph; listen)

	OFFSET	`1,8`
	REFERENCES	`M. R. Nester (1999). Mathematical investigations of some plant interaction designs. PhD Thesis. University of Queensland, Brisbane, Australia.`
	FORMULA	`2*A056345(n)-A056285(n).`
	EXAMPLE	`For example, aaabbb is not a (finite) palindrome but it is a periodic palindrome.`
	CROSSREFS	`Cf. A056456.` `Sequence in context: A087004 A049058 A056501 this_sequence A044247 A044628 A043478` `Adjacent sequences: A056488 A056489 A056490 this_sequence A056492 A056493 A056494`
	KEYWORD	`nonn`
	AUTHOR	`Marks R. Nester (nesterm(AT)dpi.qld.gov.au)`

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Last modified November 21 14:49 EST 2008. Contains 150807 sequences.

AT&T Labs Research