A056452 - OEIS

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A056452

Palindromes using a maximum of six different symbols.

6, 6, 36, 36, 216, 216, 1296, 1296, 7776, 7776, 46656, 46656, 279936, 279936, 1679616, 1679616, 10077696, 10077696, 60466176, 60466176, 362797056, 362797056, 2176782336, 2176782336, 13060694016, 13060694016, 78364164096 (list; graph; refs; listen; history; internal format)

	OFFSET	`1,1`
	REFERENCES	`M. R. Nester (1999). Mathematical investigations of some plant interaction designs. PhD Thesis. University of Queensland, Brisbane, Australia.`
	LINKS	`Vincenzo Librandi, Table of n, a(n) for n = 1..2000`
	FORMULA	`a(n) = 6^floor((n+1)/2).`
	MAPLE	`A056452:=n->6^floor((n+1)/2);`
	PROG	`(MAGMA) [6^Floor((n+1)/2): n in [1..40]]; // Vincenzo Librandi, Aug 16 2011`
	CROSSREFS	`Cf. A016116.` `Sequence in context: A111437 A056464 A056454 * A183622 A176861 A038260` `Adjacent sequences: A056449 A056450 A056451 * A056453 A056454 A056455`
	KEYWORD	`nonn,base`
	AUTHOR	`Marks R. Nester (nesterm(AT)dpi.qld.gov.au)`

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Last modified February 14 23:53 EST 2012. Contains 205689 sequences.