id:A056457 - OEIS Search Results

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Palindromes using exactly six different symbols.

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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 720, 720, 15120, 15120, 191520, 191520, 1905120, 1905120, 16435440, 16435440, 129230640, 129230640, 953029440, 953029440, 6711344640, 6711344640, 45674188560 (list; graph; listen)

	OFFSET	`1,11`
	REFERENCES	`M. R. Nester (1999). Mathematical investigations of some plant interaction designs. PhD Thesis. University of Queensland, Brisbane, Australia.`
	FORMULA	`6! * stirling2( [(n+1)/2], 6).`
	CROSSREFS	`Cf. A056452, A000920.` `Sequence in context: A139195 A145226 A056467 this_sequence A068351 A067892 A137493` `Adjacent sequences: A056454 A056455 A056456 this_sequence A056458 A056459 A056460`
	KEYWORD	`nonn`
	AUTHOR	`Marks R. Nester (nesterm(AT)dpi.qld.gov.au)`

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Last modified December 20 00:58 EST 2009. Contains 171054 sequences.

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